Electric cars: New vehicles to emit noise to aid safety(bbc.co.uk)
bbc.co.uk
Electric cars: New vehicles to emit noise to aid safety
https://www.bbc.co.uk/news/business-48815968
196 comments
It would be both fun and annoying if people start customizing the sounds their car make as they drive by. I could see the passing star destroyer sound as pretty cool but a recreation of the Harley-Davidson rumble as annoying.
Maybe just let people dial in a few modulation variables to a default growl sound. A limited synth. You could tweak it till your dog recognizes it.
Sell some warm sounding effects as vehicle add-ons like a delay or reverb unit.
Sell some warm sounding effects as vehicle add-ons like a delay or reverb unit.
That easy enough to work around. Just ban noise that's too loud. And if some trolls oppose an arbitrary db limit for some inane reason, just ban noise that could cause hearing injuries -- and strip a good 10 or 20db on the basis that kids get hearing damage at much lower db levels than adults. A Harley Davidson sound at the sound level of a low power vacuum cleaner is so hilariously emasculated that someone driving the car you describe would be ruthlessly ridiculed.
As somebody living next to a road - just no. I can hear bicycles going by inside at night when it is quiet. (The ones that have some things wrong with them, granted.) Any intentional additional traffic noise without a clear safety benefit should be banned.
One existing example...
https://youtu.be/n17B_uFF4cA
https://youtu.be/n17B_uFF4cA
If you live in a city in the Netherlands, you are surely used to 90% of vehicles (as in, bikes) not making a sound?
Indeed, so my assumption is that this law is trying to keep things from changing.
People will have to adapt to silent cars. But that's scary.
Everybody knows that you have to look before making a turn or changing lanes. We also know that by and large people who listen to music or have a headset for a phone conversation are not killed en masse.
I think that is law is a pity. There is enough noise pollution already.
People will have to adapt to silent cars. But that's scary.
Everybody knows that you have to look before making a turn or changing lanes. We also know that by and large people who listen to music or have a headset for a phone conversation are not killed en masse.
I think that is law is a pity. There is enough noise pollution already.
I hate noise pollution too but some people are blind.
Right. And electric vehicle with AVAS emitters fitted are still much, much quieter than most combustion vehicles!
Is that still actually true? Surely they're quieter than the average car from the 1970s, but the loudest sound you get from a lot of modern gasoline-powered vehicles at low speeds is the "whoosh" from air displacement, not the engine.
Even modern combustion engines are still pretty noisy at low speeds compared to EVs. Especially when starting up or when revving to pull away at an intersection. At < 12 mph they’re not displacing enough air to make a “whoosh”!
Diesel engines, endemic in Europe even in small cars, are particularly noisy.
Diesel engines, endemic in Europe even in small cars, are particularly noisy.
Conductive headphones are great for running outside and not getting killed. Your ears are free to hear while you feel the music well enough.
Silent cars are dangerous. It’s not extremely dangerous, but we have lots of cars. Consider even very slow speed collisions can be dangerous. People get pinned or pushed into traffic etc.
Comparing even a fairly low number of deaths and serious injuries vs a minor noise from moving cars and it’s an obvious choice IMO.
Comparing even a fairly low number of deaths and serious injuries vs a minor noise from moving cars and it’s an obvious choice IMO.
In my opinion these kinds laws are of the kind that "we need to do something because we need to do something". The effects are marginal. If these laws were the result of solid scientific studies and engineering it would be different, but they are not.
Basically everybody has to pay the price of having more noise pollution to save a few people not paying attention at what they are doing.
The reason we get these kinds rules is because there is a regulatory framework for cars. which makes it easy to add additional requirements.
For example, in the Netherlands both electric mopeds and high speed electric bikes get more popular. Certainly the bikes are at high speed essentially silent (small bike tires have less friction and make less noise).
Because there is no framework to require bikes to make noise they don't have to. And needless to say, a collision with a bike going 45 km/h will do a lot of damage.
If people bumping into silent things was a wide spread problem, then yes it would make sense to require every thing to make noise.
But these types of accidents are just that, accidents. They will always happen. Taking random measures to reduce accidents with an unknown amount will just make society as a whole worse.
Basically everybody has to pay the price of having more noise pollution to save a few people not paying attention at what they are doing.
The reason we get these kinds rules is because there is a regulatory framework for cars. which makes it easy to add additional requirements.
For example, in the Netherlands both electric mopeds and high speed electric bikes get more popular. Certainly the bikes are at high speed essentially silent (small bike tires have less friction and make less noise).
Because there is no framework to require bikes to make noise they don't have to. And needless to say, a collision with a bike going 45 km/h will do a lot of damage.
If people bumping into silent things was a wide spread problem, then yes it would make sense to require every thing to make noise.
But these types of accidents are just that, accidents. They will always happen. Taking random measures to reduce accidents with an unknown amount will just make society as a whole worse.
> Taking random measures to reduce accidents with an unknown amount will just make society as a whole worse.
It’s not random, actual studies gave demonstrated the risk for years. https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/... “The HEV was two times more likely to be involved in a pedestrian crash in these situations than was an ICE vehicle.”
And no it’s not just about people not paying attention, the blind don’t get the option on this one.
It’s not random, actual studies gave demonstrated the risk for years. https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/... “The HEV was two times more likely to be involved in a pedestrian crash in these situations than was an ICE vehicle.”
And no it’s not just about people not paying attention, the blind don’t get the option on this one.
That's why it is random. Solid engineering implies that you estimate how much effect this measure will have.
Note that the report says 'Incidence rates provided in this report should be interpreted with caution due to the small sample size.'
If this was solid engineering, there would minimum noise requirements to help people with reduced vision.
This is similar to having a man with a flag walk in front of car. Because those horseless vehicles are just scary.
Note that the report says 'Incidence rates provided in this report should be interpreted with caution due to the small sample size.'
If this was solid engineering, there would minimum noise requirements to help people with reduced vision.
This is similar to having a man with a flag walk in front of car. Because those horseless vehicles are just scary.
I was intentionally linking to an early study. There are plenty of studies looking into this issue and more than enough data to determine it’s a real problem. In fact many hybrids have included such systems for years.
Here is a more recent example with far more data. https://www.iihs.org/media/0465243f-89d5-4fa7-95c1-367f1e2c1...
Overall it’s on the order of hundreds more deaths in the US alone assuming every car becomes a hybrid or electric vehicle without these systems.
Here is a more recent example with far more data. https://www.iihs.org/media/0465243f-89d5-4fa7-95c1-367f1e2c1...
Overall it’s on the order of hundreds more deaths in the US alone assuming every car becomes a hybrid or electric vehicle without these systems.
And even without deaths it's far more comfortable as a pedestrian if I can hear a car coming before I turn my head. Situational awareness as another comment mentioned elsewhere relies on all of the senses. I for one would like more sound from e-scooters; been almost hit a few times.
Personally I'd rather have the environment as free of noise pollution as possible, and I'll just look both ways before I cross the street.
Meanwhile, parking lots turn into a deadly game of frogger...
The average reaction time for humans is 0.25 seconds to a visual stimulus, 0.17 for an audio stimulus. You’re crossing at a crosswalk past stopped cars and someone takes their foot off the break, you will dodge faster with engine noises. And, it’s not just about crossing the street, knowing a car is on changes how people walk past seemingly parked cars.
Worse, saying you will just get this right every single time you do it, however you only need to make a mistake once to die.
The average reaction time for humans is 0.25 seconds to a visual stimulus, 0.17 for an audio stimulus. You’re crossing at a crosswalk past stopped cars and someone takes their foot off the break, you will dodge faster with engine noises. And, it’s not just about crossing the street, knowing a car is on changes how people walk past seemingly parked cars.
Worse, saying you will just get this right every single time you do it, however you only need to make a mistake once to die.
I don't want the noise and I don't agree it's necessary.
A claimed 0.08 seconds improved reaction time (were you implying that was a lot? because a slow-moving car doesn't go far in 0.08s) is not enough reason in my opinion to have what are bound to be deafening beepers everywhere. So noise! much safety! You are proposing a ridiculous noisy dystopia. Imagine a carpark full of cars loudly beeping at all times!
Cars should have sensors like parking sensors for when they're moving slowly, or flashing lights, or literally any other solution than more meaningless noise in our already much too noisy environment.
You are overstating the danger with your, "you only need to make a mistake once to die" alarmism.
A claimed 0.08 seconds improved reaction time (were you implying that was a lot? because a slow-moving car doesn't go far in 0.08s) is not enough reason in my opinion to have what are bound to be deafening beepers everywhere. So noise! much safety! You are proposing a ridiculous noisy dystopia. Imagine a carpark full of cars loudly beeping at all times!
Cars should have sensors like parking sensors for when they're moving slowly, or flashing lights, or literally any other solution than more meaningless noise in our already much too noisy environment.
You are overstating the danger with your, "you only need to make a mistake once to die" alarmism.
The study you linked is pretty interesting. They attempt to control for the variables by only studying cars with highly similar models of hybrid and non-hybrid variety. They show a 17% increase in the number of bodily injury claims without a corresponding property damage claim. They do disclaim that they can’t actually tell from this data if a pedestrian was actually involved.
But I wonder if there’s one thing missing here. Hybrids have a lot higher low-end torque. I think the definitive study would be on a hybrid car with and without the noise, and I’m not sure if they ever tried to do that for the Leaf?
But I wonder if there’s one thing missing here. Hybrids have a lot higher low-end torque. I think the definitive study would be on a hybrid car with and without the noise, and I’m not sure if they ever tried to do that for the Leaf?
It’s hard to put a value on what lowering ambient sound levels in a city might be worth. Or overall even how many lives it could save. Or productivity and wellbeing increases due to lower stress levels.
A minor noise from moving cars? How about this horrifying little marketing piece from Nissan [1] about their new “Canto” noise they are going to emit?
Besides, these noise levels are calibrated to be loud enough in a bustling city at high noon. They are not dynamic based on time of day, or location, or actual ambient sound levels. So, in other words, they will be loud and obnoxious, particularly outside of the city, where ambient is almost 20dB lower.
[1] - https://youtu.be/p4cjPk8mqEM
A minor noise from moving cars? How about this horrifying little marketing piece from Nissan [1] about their new “Canto” noise they are going to emit?
Besides, these noise levels are calibrated to be loud enough in a bustling city at high noon. They are not dynamic based on time of day, or location, or actual ambient sound levels. So, in other words, they will be loud and obnoxious, particularly outside of the city, where ambient is almost 20dB lower.
[1] - https://youtu.be/p4cjPk8mqEM
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Yes, and silent bike interactions happen all the time. But a silent bike interaction is like this:
'Cyclist behind some pedestrians, other slow cyclists'
'Cyclist either rings bell or says 'excuse me''
In a car situation, the car would have to honk its horn which is much more interrupting to people trying to sleep then small 'vmmm' which is only hearable in a small radius around the car.
Peds and cyclists often share spaces, and cyclists and cars also often share spaces. The issue is how can a faster silent vehicle safely and socially share a space with slower more vulnerable vehicles.
We have daily accidents with peds walking into a bike path unpredictably and causing conflict. (Not necessarily a crash but annoyance by cyclist having to do evasive maneuver). However if an crash happens its not usually do bad, while even a low speed collision with a car will damage your bike and the car and cost $$$.
So I wouldn't look at the bike as an example of a silent vehicle working well in a city environment. We have many accidents they are just also very minor accidents.
For the people who will point out that this could also be solved with better infrastructure, I agree. Most of the accidents happen at places where e.g. peds get a green light to cross the road and then continue to cross the cycle path on the other side because in their mind they are protected by the green light, but actually now cyclists have right of way. Sometimes we put zebra crossings across bike paths but then everyone is confused because the cyclists don't stop anyway and it just causes more conflict because still the rules are being broken but just by the other party now.
tl;dr rules are confusing and people don't follow them anyway. A city environment is super dynamic, and often infrastructure cannot be changed. Adding 'vmmm's makes those interactions much easier, and its really doesn't cause the noise pollution people keep talking about.
'Cyclist behind some pedestrians, other slow cyclists'
'Cyclist either rings bell or says 'excuse me''
In a car situation, the car would have to honk its horn which is much more interrupting to people trying to sleep then small 'vmmm' which is only hearable in a small radius around the car.
Peds and cyclists often share spaces, and cyclists and cars also often share spaces. The issue is how can a faster silent vehicle safely and socially share a space with slower more vulnerable vehicles.
We have daily accidents with peds walking into a bike path unpredictably and causing conflict. (Not necessarily a crash but annoyance by cyclist having to do evasive maneuver). However if an crash happens its not usually do bad, while even a low speed collision with a car will damage your bike and the car and cost $$$.
So I wouldn't look at the bike as an example of a silent vehicle working well in a city environment. We have many accidents they are just also very minor accidents.
For the people who will point out that this could also be solved with better infrastructure, I agree. Most of the accidents happen at places where e.g. peds get a green light to cross the road and then continue to cross the cycle path on the other side because in their mind they are protected by the green light, but actually now cyclists have right of way. Sometimes we put zebra crossings across bike paths but then everyone is confused because the cyclists don't stop anyway and it just causes more conflict because still the rules are being broken but just by the other party now.
tl;dr rules are confusing and people don't follow them anyway. A city environment is super dynamic, and often infrastructure cannot be changed. Adding 'vmmm's makes those interactions much easier, and its really doesn't cause the noise pollution people keep talking about.
Yes to all this.
I also wonder whether cars ought to have something less loud than the horn, for communicating with people who aren't encased in metal. Like trams (many places) have a little bell.
I also wonder whether cars ought to have something less loud than the horn, for communicating with people who aren't encased in metal. Like trams (many places) have a little bell.
Note that the sound trams in Amsterdam make for example only sound like a little bell from a good distance. Close up those things are exceedingly loud (and for good reason).
The tram bell is one of the more horrifying sounds you can hear on the road though. Basically, get out of the way or get hit, since it can neither evade nor stop fast.
I notice that the bike messengers in the city now have “horns” that are more like an electric beep that is not as loud as a car. Also, the police cars have rumblers that you feel more than hear.
When I’m in NYC, I always wish there was a counter for horn-presses that eventually triggers an automatic fine if you use your horn too much.
When I’m in NYC, I always wish there was a counter for horn-presses that eventually triggers an automatic fine if you use your horn too much.
I've heard from a friend that his relative in India absolutely won't drive with a broken horn, because that is how you let people know where you are.
I'm curious how much of the honking in NYC is, say, "on your left" vs "up yours" compared to other cities/countries.
I'm curious how much of the honking in NYC is, say, "on your left" vs "up yours" compared to other cities/countries.
I’d say it’s mostly a form of complaining that traffic isn’t moving, even when the people in front are also stuck. It’s truly pointless noise-making.
'Cyclist either rings bell or says 'excuse me''
In a car situation, the car would have to honk its horn which is much more interrupting to people trying to sleep then small 'vmmm' which is only hearable in a small radius around the car.
Give the electric car a little bell? (Former electric car driver here.)
In a car situation, the car would have to honk its horn which is much more interrupting to people trying to sleep then small 'vmmm' which is only hearable in a small radius around the car.
Give the electric car a little bell? (Former electric car driver here.)
In a car situation, the car would have to honk its horn which is much more interrupting to people trying to sleep then small 'vmmm' which is only hearable in a small radius around the car.
I drive a hybrid and at least once I simply opened the window and said "excuse me" - people were surprised, but also happy to not hear the horn.
I drive a hybrid and at least once I simply opened the window and said "excuse me" - people were surprised, but also happy to not hear the horn.
So jealous of Dutch streets. People can be so civilized with bike/ped interactions. Put people behind glass and steel of cars, and it seems like they only shout "fuck you" at each other.
It’s the Dutch. Bicyclists (and those scooter riders) are huge assholes to pedestrians here in DC.
I lived in Beijing where the bikes weren’t very silent (not oiled very well, always squeaky) but the electric bikes would just come up silently from behind and almost nail you. Electric bikes with noise would be a great idea, even if it was just a squeak.
Bikes generally won't kill you in a collision.
I've always felt like bicycle and foot traffic should be in the opposite direction of car traffic so they have a better idea of what's coming next.
That’s why in nyc you always look both ways, even on a one-way street
It doesn't work for cycling. A couple of reasons why...
People pulling out of side streets have to either merge into the first lane of traffic, or cross that lane and merge into the second (generally). If you have cyclists coming against the flow of traffic at sometimes 20mph, that driver now has to cross 2 lanes of traffic, and always at least one.
Car drivers rarely give cyclists space (in the US) as it is when traveling the same direction. How unnerving would that experience be when what was a 10/15/20 mph difference in passing speed effectively doubles (and then some)?
People pulling out of side streets have to either merge into the first lane of traffic, or cross that lane and merge into the second (generally). If you have cyclists coming against the flow of traffic at sometimes 20mph, that driver now has to cross 2 lanes of traffic, and always at least one.
Car drivers rarely give cyclists space (in the US) as it is when traveling the same direction. How unnerving would that experience be when what was a 10/15/20 mph difference in passing speed effectively doubles (and then some)?
I think the Renault Zoe makes the sound you are describing? Sounds a bit like a science fiction sound effect, a slightly metallic humming
I absolutely love it. It also gives nice feedback while driving, as acceleration sounds different from coasting, different from braking. Some of this is probably just unavoidable switching noise, but I can't help but feel it's also designed that way.
I have a Zoe, the noise is soft and stops above 30 km/h. I can turn it off with a switch if I want to. I've already noticed people being surprised when I pass them without the noise, so I keep it activated.
Yes, the Zoe, Leaf, and many other EVs are already compliant with this rule.
I believe under the EU rules, sound is only emitted up to 20km/h (12 mph).
I believe under the EU rules, sound is only emitted up to 20km/h (12 mph).
> I believe under the EU rules, sound is only emitted up to 20km/h (12 mph).
Doesn't that make it pretty pointless then? Collisions below that speed are almost never fatal even for pedestrians.
I feel like it may actually be better for inattentive drivers to hit something at those kinds of speeds and jar them into being more careful in the future (and have their insurance rightfully dinged) than to have their first experience of their not paying attention causing them to hit something occur at a higher speed.
Doesn't that make it pretty pointless then? Collisions below that speed are almost never fatal even for pedestrians.
I feel like it may actually be better for inattentive drivers to hit something at those kinds of speeds and jar them into being more careful in the future (and have their insurance rightfully dinged) than to have their first experience of their not paying attention causing them to hit something occur at a higher speed.
In my experience you hear the cars due to tire noise at velocities higher than that since electric cars still make quite a bit of noise driving at speed over asphalt.
Above that speed you hear tires, wind, etc...
Friend has a Zoe and it makes perfect sense. When driving slow, like in a parking lot its amazing how futuristic it seems when he disables the "noise" - it's totally silent, very dangerous. So I think this is a good directive.
Friend has a Zoe and it makes perfect sense. When driving slow, like in a parking lot its amazing how futuristic it seems when he disables the "noise" - it's totally silent, very dangerous. So I think this is a good directive.
I prefer not to be hit, even if it's not fatal.
Chronic nerve pain or lifelong paralysis doesn’t sound great
Then it's a good thing that almost never happens at such low speeds.
But it does happen at even moderately higher speeds. Isn't that the argument used to justify all of those traffic calming measures? Make people feel less safe so they act more safe? Doing this is exactly the opposite of that, so either one of them is wrong or the other is.
But it does happen at even moderately higher speeds. Isn't that the argument used to justify all of those traffic calming measures? Make people feel less safe so they act more safe? Doing this is exactly the opposite of that, so either one of them is wrong or the other is.
You can even change that sound in the Zoe, there's a list of different sounds you can pick from :)
Who's running largest car sound database where you can download sounds? Ridge racer? Ferrari? Good old Beetle or T-Ford etc.
The vehicles in science fiction might just have speakers too.. maybe there was never actually a physical reason for that specific noise. Hm.
The switching noise of the IGBTs is a good start, they are already associated with electric motors. Some nicely sounding harmonics can also be produced with it: https://youtu.be/-SDYdHzT7Qw
That's a Siemens ES64U2 if anyone wants to research it further. https://en.wikipedia.org/wiki/EuroSprinter
It's a complicated issue, but my disappointment is that we have the chance to be free from widespread traffic noise, for the first time in almost a century. Yet it's to become mandatory. It's not as though traffic noise is benign:
https://www.ncbi.nlm.nih.gov/pubmed/7440003
https://www.ncbi.nlm.nih.gov/pubmed/7440003
> but my disappointment is that we have the chance to be free from widespread traffic noise
No, we don't have this chance unless you implement a 20 mph speed limit everywhere. Above that speed it matters less and less that you have an electric engine because the tires and aerodynamic noise will be the main sources of sound.
That's why this regulation only requires the artifical sound up to 12 mph, above that speed they car is loud enough anyway.
No, we don't have this chance unless you implement a 20 mph speed limit everywhere. Above that speed it matters less and less that you have an electric engine because the tires and aerodynamic noise will be the main sources of sound.
That's why this regulation only requires the artifical sound up to 12 mph, above that speed they car is loud enough anyway.
The motor is louder than the tires until around 40 km/h for cars and 60 km/h for trucks [1]. And it matters even a bit after that because noise is adding up. Those speeds are pretty close to how fast cars go where people live.
[1]: http://www.leiserstrassenverkehr.bayern.de/entstehung/index....
[1]: http://www.leiserstrassenverkehr.bayern.de/entstehung/index....
The limit doesn't have to be at the point where motor stops being louder. They only have to cover the range where all car induced noise is too quiet and only to extent necessary to mitigate this for EVs.
You’re right, but it’s absolutely possible to optimize wind and tyre noise too, but it doesn’t make much sense unless you eliminate engine noise. There are already tyres marketed for EVs that claims to reduce noise. EVs also tend to optimize for lower air resistance as well, since it increases range. Seems like we’re getting cameras instead of mirrors too now.
Another thing that would help a lot is if we can keep asphalt smooth. Driving an EV on fresh asphalt is incredibly satisfying, as it seems to eliminate most of the tyre noise. Maybe we could have automate vehicles laying down a thin layer of that rubbery material (bitumen?) regularly?
Id also claim that winds and tyre noise is less annoying than engine noise. It’s more like a water fall, and don’t penetrate walls as much as, say, a deep rumbling truck engine.
Another thing that would help a lot is if we can keep asphalt smooth. Driving an EV on fresh asphalt is incredibly satisfying, as it seems to eliminate most of the tyre noise. Maybe we could have automate vehicles laying down a thin layer of that rubbery material (bitumen?) regularly?
Id also claim that winds and tyre noise is less annoying than engine noise. It’s more like a water fall, and don’t penetrate walls as much as, say, a deep rumbling truck engine.
The implementation requirements are defined in Annex VIII of https://eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX:52... and there's an upper bound (as in: not louder than an ICE car) but no lower bound.
From reading that Annex, Renault Zoe should be compliant (sound engine below 30km/h, can be disabled, sound adapts to speed) and while it's clearly audible on the sidewalk, it's significantly more muted than an ICE car: I don't think it's audible through a closed window, and probably not even through an open window that's somewhat raised.
Plus, such a system doesn't _allow_ for the more pronounced noises ICEs can make in urban traffic (eg. cranking up the engine speed to show off).
From reading that Annex, Renault Zoe should be compliant (sound engine below 30km/h, can be disabled, sound adapts to speed) and while it's clearly audible on the sidewalk, it's significantly more muted than an ICE car: I don't think it's audible through a closed window, and probably not even through an open window that's somewhat raised.
Plus, such a system doesn't _allow_ for the more pronounced noises ICEs can make in urban traffic (eg. cranking up the engine speed to show off).
Interestingly the beginning of the document you linked is all about reducing noise levels and the deleterious effects of car noise on human health and well-being.
> Traffic noise harms health in numerous ways. Protracted noise-related stress can exhaust human physical reserves, disrupt the regulatory capacity of organ functions and hence limit their effectiveness. Traffic noise is a potential risk factor for the development of medical conditions and incidents such as high blood pressure and heart attacks.
But you are looking at an old draft. The updated Annex VIII references another document which does indeed specify a minimum noise level.
https://ec.europa.eu/transparency/regdoc/rep/3/2017/EN/C-201...
> Traffic noise harms health in numerous ways. Protracted noise-related stress can exhaust human physical reserves, disrupt the regulatory capacity of organ functions and hence limit their effectiveness. Traffic noise is a potential risk factor for the development of medical conditions and incidents such as high blood pressure and heart attacks.
But you are looking at an old draft. The updated Annex VIII references another document which does indeed specify a minimum noise level.
https://ec.europa.eu/transparency/regdoc/rep/3/2017/EN/C-201...
Oops, thanks.
Because this requires more digging: the detailed specs come from UNECE Regulation 138 which can be found at https://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29regs... (which also seems to be the current edition at this time, according to the special interest database at https://globalautoregs.com/rules/205-quiet-road-transport-ve...).
The relevant parts are 6.2.1.2 and the table in 6.2.8, and they lay out a minimum sound level of 56dB(A) at 2m distance to the car (PP' line, as defined in the appendix to Annex 3) at 20km/h, that must be spread out over two of the bands in the table (at least one <= 1600Hz)
In other tables on the net, I get 50dB as the "minimum street noise", 70dB for a car at 10m distance and 45-60dB for a quiet-to-normal conversation at 1m distance. 56dB at 2m still seems relatively muted in that context.
Because this requires more digging: the detailed specs come from UNECE Regulation 138 which can be found at https://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29regs... (which also seems to be the current edition at this time, according to the special interest database at https://globalautoregs.com/rules/205-quiet-road-transport-ve...).
The relevant parts are 6.2.1.2 and the table in 6.2.8, and they lay out a minimum sound level of 56dB(A) at 2m distance to the car (PP' line, as defined in the appendix to Annex 3) at 20km/h, that must be spread out over two of the bands in the table (at least one <= 1600Hz)
In other tables on the net, I get 50dB as the "minimum street noise", 70dB for a car at 10m distance and 45-60dB for a quiet-to-normal conversation at 1m distance. 56dB at 2m still seems relatively muted in that context.
No, 70dB is a vacuum cleaner level noise. 60dB is not a single conversation, more like a restaurant full of people.
But most importantly, perceived volume is highly relative. In a noisy urban environment that god-awful drivetone might not horrible, but it still has to be noticeable. After all, the busy urban environment is exactly where it's theoretically supposed to be helping people notice the car! But how about when someone is driving through their suburban condo complex coming home after a late night of work?
But most importantly, perceived volume is highly relative. In a noisy urban environment that god-awful drivetone might not horrible, but it still has to be noticeable. After all, the busy urban environment is exactly where it's theoretically supposed to be helping people notice the car! But how about when someone is driving through their suburban condo complex coming home after a late night of work?
Blip to show can be replaced by a multi-tone air horn system as in trains (low tone as departure and impatience horn, higher tone(s) as aversive warning).
We are not a smart species. Birds have been impacted by traffic noise as well.
https://www.waterboards.ca.gov/waterrights/water_issues/prog...
The reason this only applies under 12 mph is that tire noise (and aero drag later) takes over as cars start to go faster. Even without this mandate (many already have it), you would not have had silent traffic.
I’ll be honest, I haven’t read into it much, but maybe they can make the frequency emitted relatively high in order to reduce the amount of distance the sound travels? I know it can’t be too high or elderly or the hard of hearing may struggle to hear it, but just a thought.
>widespread traffic noise, for the first time in almost a century
Well, in cities horses and horse driven carriages on pebbles/stone pavements weren't that much silent even before that.
Admittedly there were much less vehicles overall, but the sound of the horseshoes is very loud, to which you add the wooden (but usually with a steel ring) wheels, possibly the drivers shouting at their horses and what not and I don't think that a street in - say - central New York in 1899 was particularly silent.
Compare with (scroll down to find "THE HORSELESS CARRIAGE AND PUBLIC HEALTH":
https://archive.org/stream/scientific-american-1899-02-18/sc...
>The noise and clatter which makes conversation al-
most impossible on many streets of New York at the
present time will be done away with, for horseless vehi-
cles of all kinds are always noiseless or nearly so. This
question of noise has much to do with the general
health of the community. Specialists have many times
expressed an opinion that the nervous diseases which
exist in the city are aggravated, if not caused, in many
cases, by noises incident to a great city's traffic. The
bells of the new vehicles will of course be somewhat
annoying at first.
Well, in cities horses and horse driven carriages on pebbles/stone pavements weren't that much silent even before that.
Admittedly there were much less vehicles overall, but the sound of the horseshoes is very loud, to which you add the wooden (but usually with a steel ring) wheels, possibly the drivers shouting at their horses and what not and I don't think that a street in - say - central New York in 1899 was particularly silent.
Compare with (scroll down to find "THE HORSELESS CARRIAGE AND PUBLIC HEALTH":
https://archive.org/stream/scientific-american-1899-02-18/sc...
>The noise and clatter which makes conversation al-
most impossible on many streets of New York at the
present time will be done away with, for horseless vehi-
cles of all kinds are always noiseless or nearly so. This
question of noise has much to do with the general
health of the community. Specialists have many times
expressed an opinion that the nervous diseases which
exist in the city are aggravated, if not caused, in many
cases, by noises incident to a great city's traffic. The
bells of the new vehicles will of course be somewhat
annoying at first.
This is a "whataboutism," the point was that we could have much less noise in towns and cities, which would be nice.
Well, my point was simply that the same wish has been made - almost to the letter - when the horseless carriages were introduced, or - if you prefer - that when the electric cars will be the only vehicles around we will have finally some less noise after several centuries, but the noise was not "introduced" by cars, and as a matter of fact 19th centuries city streets were likely as noisy or worse.
[deleted]
Disagree, the safety noise is significantly lower than the noise of a car driving fast.
If you want to eliminate traffic noise, you have to rip horns out of cars. And I'm not sure how many are actually advocating for that.
Isn't using your horn banned in most major cities anyways? It is in Vienna at least.
I see the "no horn" sign occasionally in Europe, but the country I learned in (the UK) doesn't use it.
I think the only time I've used the horn was when, stopped at a red light, the car ahead started to roll backwards towards me.
What do people do in this situation, in Vienna or some other place where using the horn is banned?
I think the only time I've used the horn was when, stopped at a red light, the car ahead started to roll backwards towards me.
What do people do in this situation, in Vienna or some other place where using the horn is banned?
'What do people do in this situation..'
Assuming the horn actually still works, use it. In such a situation, the risk of being hit far outweighs that of being prosecuted.
Assuming the horn actually still works, use it. In such a situation, the risk of being hit far outweighs that of being prosecuted.
As a fellow Viennese I think we can agree that even if it is banned nobody cares and one is frequently blasted with a horn for no apparent reason rather than being in front of someone
It isn't in many really big cities, e.g. Hong Kong or Istanbul
Wouldn't stop the sirens.
I drive an electric car which already does this. Is a very futuristic and smooth sounding noise, and it sounds nice. Not like an ICE engine. People immediately notice you and recognize that you are in some new type of car. It feels positive, not negative at all as some comments here suggest.
Also, there is a button to disable that noise if you want to (at least in the Ioniq)
Also, there is a button to disable that noise if you want to (at least in the Ioniq)
The Honda Clarity has no button to turn it off. My kids hate the attention it gets when I pull up to pick them up at school. It sounds like a spaceship full of slightly out of tune angels.
Presumably it has a speaker some place? Could you cut the wire to it?
Wow, that really is absolutely horrifying [1]. The people advocating for this must have no idea the hell they will be putting us all through. Or they work for the oil companies.
Advanced pedestrian avoidance systems would prevent more injuries than this joke. This regulation shows such a complete lack of vision or respect. So glad I got my EV before this became mandatory.
[1] - https://youtu.be/QaxykqCkCjg
Advanced pedestrian avoidance systems would prevent more injuries than this joke. This regulation shows such a complete lack of vision or respect. So glad I got my EV before this became mandatory.
[1] - https://youtu.be/QaxykqCkCjg
I think it's a nice idea OUTSIDE the vehicle.
But some car manufacturers are idiots (no other word) and add sounds INSIDE the vehicle.
The Nissan Leaf has tons of gratuitous sounds that cheapen the car.
When you turn the car on and off, they have startup and shutdown sounds like a cheap canon camera.
And they have a "futuristic" driving motor sound, which is probably damaging some of your hearing frequencies on long drives.
But some car manufacturers are idiots (no other word) and add sounds INSIDE the vehicle.
The Nissan Leaf has tons of gratuitous sounds that cheapen the car.
When you turn the car on and off, they have startup and shutdown sounds like a cheap canon camera.
And they have a "futuristic" driving motor sound, which is probably damaging some of your hearing frequencies on long drives.
Wait the whirr sound on the Nissan Leaf is coming from a speaker?? I have had a Leaf since 2016 and thought that was just the sound the motor makes (my first EV).
Outside sound for pedestrians on the Leaf is not annoying and a good safety feature IMO.
Outside sound for pedestrians on the Leaf is not annoying and a good safety feature IMO.
I believe leafspy will let you disable these sounds individually. You have to have a 2013 or later leaf. You also have to buy the leafspy app + an inexpensive bluetooth OBD2 dongle.
I'm actually a fan of gratuitous noise inside the cabin, as hopefully it reminds drivers of the noise nuisance they make outside.
If only there was a way to pipe and amplify their tyre noise into the cabin too instead of having it insulated away.
If only there was a way to pipe and amplify their tyre noise into the cabin too instead of having it insulated away.
Do you have any idea how loud iron-shod wagon wheels on cobblestones are? They're not quiet, for sure.
Maybe people don't get the point because they don't walk that much with light traffic around, but we do this all the time in my city old town area... and you just don't hear the Prius cab that's right behind you after popping out of nowhere. It's been years now and it still gets me every time, luckily they drive carefully.
Reminds me of the story, in the UK, of a partially-sighted guy who was hit twice at the same spot by the same driver.
https://www.mirror.co.uk/news/uk-news/blind-man-hit-twice-sa...
https://www.mirror.co.uk/news/uk-news/blind-man-hit-twice-sa...
I own an electric car with no artificial external sound.
I'd like to have an optional sound. Using the horn is an act of aggression, but enabling a Jetsons-like sound when I want to alert pedestrians would be very useful.
You should be able to disable it. For example, when coming home and parking late at night (headlights are visible then and it is quiet so a sound causes pollution).
I'd like to have an optional sound. Using the horn is an act of aggression, but enabling a Jetsons-like sound when I want to alert pedestrians would be very useful.
You should be able to disable it. For example, when coming home and parking late at night (headlights are visible then and it is quiet so a sound causes pollution).
"I'd like to have an optional sound. Using the horn is an act of aggression ..."
I have considered this as well. That is, setting aside the issue of electric noise vs. ICE noise, I think all cars should have two horn noises - the normal "horn" and a universally defined two-beep "friendly" horn.
That "friendly" horn would be very useful in many driving situations and would make many interactions less confusing / antagonistic.
I have considered this as well. That is, setting aside the issue of electric noise vs. ICE noise, I think all cars should have two horn noises - the normal "horn" and a universally defined two-beep "friendly" horn.
That "friendly" horn would be very useful in many driving situations and would make many interactions less confusing / antagonistic.
I would prefer the sound to be universal instead of a mishmash of discordant sounds that we will end up with as every manufacturer tries to stand out, worse when each car may be different just from one manufacturer
We must be able to differentiate a phone playing a sound and a car by hearing alone, and that very quickly. We need a sound similar to emergency vehicle sirens but obviously less loud and dramatic.
So it is very important to have a universal class of sounds, and it must be forbidden to play sounds of that class on a street for other things.
So it is very important to have a universal class of sounds, and it must be forbidden to play sounds of that class on a street for other things.
In Florence (Firenze) some years ago, the Prius taxis in the historic centre had bicycle bells.
I don't consider that cars should move faster than pedestrians in a city centre, so I won't change my behaviour if I'm already walking. However, it's useful to ask people standing to move to the side.
I don't consider that cars should move faster than pedestrians in a city centre, so I won't change my behaviour if I'm already walking. However, it's useful to ask people standing to move to the side.
My girlfriend (who drives a normal petrol car) has always wanted an 'excuse me' horn. Something politer than honking that you can use to remind people you exist.
here is a DIY video with 2 more gentle sound options. It should be standard in cars imho.
https://www.youtube.com/watch?v=lv8wqnk_TsA
This is really a pity. Maybe, instead of noise, other options are available that nobody is exploring.
Maybe projecting a laser in the road ahead or something like that.
Maybe projecting a laser in the road ahead or something like that.
Sound is important, not sure if lasers on the road will give you instantly a 3d spacial position as sound does. I did not enountered electric cars so far but I had this problems with silent bicycles, you walk minding your own business and something appears besides you without you expecting it to be there, if you did a side step in that moment you would have been hit.
Our brain and ears are evolved to interpret sounds so laser workarounds won't be as effective.
Our brain and ears are evolved to interpret sounds so laser workarounds won't be as effective.
I harldy think we have evolved to react to car noises.
I mean if you hear noise you can instantly know from where you hear it, you can most of the time know if the car is moving toward you or away from you and you know if it is close or far away.
If you see a laser on the road then you don't get any instant information, what if there are more then 1 car and project light.
Anyway I meant that sound in general, we can instantly know where the sound comes from and we do not need to actively think about it.
If you see a laser on the road then you don't get any instant information, what if there are more then 1 car and project light.
Anyway I meant that sound in general, we can instantly know where the sound comes from and we do not need to actively think about it.
I think you do get a lot of information from lasers on the road. At my job the fork lift trucks have blue lasers and it works very well.
I never heard of that, can you point me how to google it? I am really curious to read about it
As a cyclist, my experience (in the US) is that pedestrians frequently react to a warning of "on your left/right" with a startled, "huh?" reaction, and turn around to the left to see what's happening. This inevitably puts them in my path, where they weren't before.
Unless I'm in a place where people generally understand the concept (shared use recreational bike paths), I don't give an audible warning unless the person is walking erratically, waving their arms as the talk, etc.
Broadly speaking, if I want people to keep doing what they're doing so I can pass safely, my experience is that it's better to just pass silently. If I want somebody to alter their behavior so I can pass safely, I'll alert them.
Unless I'm in a place where people generally understand the concept (shared use recreational bike paths), I don't give an audible warning unless the person is walking erratically, waving their arms as the talk, etc.
Broadly speaking, if I want people to keep doing what they're doing so I can pass safely, my experience is that it's better to just pass silently. If I want somebody to alter their behavior so I can pass safely, I'll alert them.
When I say ‘on your left/right’ when on a bike I make sure I have given them plenty of time and prepare to pass on the opposite side, because the main reaction I generally get is someone stepping into the side I said - a lot of people have difficulty with their sides, and/or the processing time for something like that is always longer than you expect!
[deleted]
I agree with other posters that sound is essential for cars. In the UK, it's not illegal to jaywalk (cross a road at a suitable pause in the traffic when you're not at a pedestrian crossing). In fact, most people in the UK probably don't even know what the word jaywalk means. Without the sound of an approaching car, I can imagine many more accidents. I'm sure all cyclists have stories of missed collisions with pedestrians because pedestrians could not hear an approaching cyclist and assumed the road was clear. With a car, a collision can be fatal.
> I'm sure all cyclists have stories of missed collisions with pedestrians because pedestrians could not hear an approaching cyclist and assumed the road was clear.
As somebody who cycles a lot (>4000km/year) in a major European city I encounter such situations nearly every day, but guess what: Such situations are totally fine for me. Pedestrians are the weakest traffic participants so it's my job as a cyclist to take care I don't hurt them. That applies even more to car drivers and adding artificial sound to cars doesn't exempt them from this responsibility.
As somebody who cycles a lot (>4000km/year) in a major European city I encounter such situations nearly every day, but guess what: Such situations are totally fine for me. Pedestrians are the weakest traffic participants so it's my job as a cyclist to take care I don't hurt them. That applies even more to car drivers and adding artificial sound to cars doesn't exempt them from this responsibility.
And speaking of cycling, it's not uncommon for the wind noise in your ears to deafen you to nearby cars. You just can't rely on ears.
I recently moved to electric as my preferred mode of transportation, and as a result ride an e-moped around a family busy city in central Europe. When I first started riding I rapidly became very aware that people just don't hear it, and are not used to looking for danger on the roads they're about to step on, if they haven't first heard it coming.
So I've sat at many a traffic light considering the viability of making an app for mobile that is essentially a motion triggered synthesiser, getting louder/changing pitches/stepping through a song sequence as the e-moped rider picks up speed. It has been a thought game I've played, at least a few times, and mostly after some near misses.
However lately this whole concept was defeated when I realised, basically, all I needed is a little bell to hang on the handle-bars ...
So I've sat at many a traffic light considering the viability of making an app for mobile that is essentially a motion triggered synthesiser, getting louder/changing pitches/stepping through a song sequence as the e-moped rider picks up speed. It has been a thought game I've played, at least a few times, and mostly after some near misses.
However lately this whole concept was defeated when I realised, basically, all I needed is a little bell to hang on the handle-bars ...
I cycle a lot in a city which has a lot of electric Toyota cabs. I'm always terrified by them because I can't hear them and only notice them when they are already very close to my bicycle.
The Toyota Prius already emits pedestrian warning noise at low speeds.
I’m not sure whether the current Prius sound is compliant with the new EU rules, however. Many EVs in Europe, such as the Leaf and Zoe, are already compliant.
I’m not sure whether the current Prius sound is compliant with the new EU rules, however. Many EVs in Europe, such as the Leaf and Zoe, are already compliant.
What about other bicycles and escooters? They don't make any noises. I think quiet noise from cars is ok, but maybe bicycles and e-scooters (and anything on wheels) should also make some noise.
Bicycles and escooters are rarely 1 tonne travelling 30mph.
Note that these noise emitters are only active at low speeds. In Europe, up to 20 km/h (12 mph).
I don't think this is necessary but it won't do harm either except for adding cost.
Where I live the electrics dominate and you can easily hear them unless they sneak up on you on purpose (i.e. drive 1 km/h on fresh asphalt towards your back). The electric motors emit a whine that is very distinct you also hear the tires.
A much bigger problem in this area is people walking around with headphones / earplugs getting injured.
Where I live the electrics dominate and you can easily hear them unless they sneak up on you on purpose (i.e. drive 1 km/h on fresh asphalt towards your back). The electric motors emit a whine that is very distinct you also hear the tires.
A much bigger problem in this area is people walking around with headphones / earplugs getting injured.
That whine you're hearing may actually be a safety sound, not the electric motor. At least in the US, most electric vehicles already emit a safety sound at low speeds that sounds like a quiet whine or hum.
Noise pollution in big cities is a thing. I think it’s a terrible idea.
Most electric vehicles emit such a whine, but Tesla's don't. While I up to now thought that was caused by superior engineering I now wonder if these vehicles already carry such a sound generator instead.
I was going to make fun of this, but realized I’m not blind - if some who is could tell me how much they depend on sound of a car to determine safety is really appreciate it.
[edit: I vaguely recall seeing a show that said the primary source of noise on the highway at least was due to tires on the road rather than engine noise]
[edit: I vaguely recall seeing a show that said the primary source of noise on the highway at least was due to tires on the road rather than engine noise]
I am blind and depend on the sound of cars a lot. When crossing busy streets I listen for traffic patterns to let me know what light is green and red. On less busy streets I listen for individual cars. There are not a lot of electric cars around me so I don't have any first hand experience on if tire noise is enough.
I don’t think tire noise would be enough at low speed (I mean I’ve heard cars with very load wheels+suspension but I suspect that wasn’t by design).
It was intended more for the context of making highways quieter, for that you need something more complex - it’s things like the sound of the tread itself hitting the pavement etc
It was intended more for the context of making highways quieter, for that you need something more complex - it’s things like the sound of the tread itself hitting the pavement etc
I wonder what data, if any, this decision is based on. The only reference is to the organization Guide Dogs, which makes me think, maybe it's sufficient for them to emit noise that dogs (and children) can hear?
On a semi-unrelated note, the other day I was thinking that difficult road sections should be fitted with beacons that cars can talk to in order to get a more accurate understanding of the roads during difficult weather situations, such as snow.
Maybe such beacons could emit light/sound as well, when they're actively talking to a car, rather than the car itself having to emit noise. Though I understand that this puts the responsibility back in the hands of politicians/road authorities, which of course they don't want.
Though to be fair, I get the reason for this decision. I was just looking forward to quieter cities.
On a semi-unrelated note, the other day I was thinking that difficult road sections should be fitted with beacons that cars can talk to in order to get a more accurate understanding of the roads during difficult weather situations, such as snow.
Maybe such beacons could emit light/sound as well, when they're actively talking to a car, rather than the car itself having to emit noise. Though I understand that this puts the responsibility back in the hands of politicians/road authorities, which of course they don't want.
Though to be fair, I get the reason for this decision. I was just looking forward to quieter cities.
"Maybe such beacons could emit light/sound as well, when they're actively talking to a car, rather than the car itself having to emit noise"
The noise is supposed to tell other road users where the car is, how would this help, except to tell road users that there is a car on a junction.
The noise is supposed to tell other road users where the car is, how would this help, except to tell road users that there is a car on a junction.
Makes perfect sense. If it doesn’t make enough sound it’s not safe for pedestrians, especially blind ones. Maybe it should be muted at higher speeds when tyre/wind noise is enough. It’s most important at low speeds and when reversing.
I wonder what sound they will choose. Part of me wants the sound of horses hooves, but I expect something like “Teslaa-aaa”
While fun, I hope the will pull all registers of psychoacoustics and sound design to create something that maximizes safety and minimizes noise.
Actual future:
PING
VEHICLE IN TRANSIT
PING
VEHICLE IN TRANSIT
PING
VEHICLE IN TRANSIT
(inaudible subsonic vibration to alert hearing impaired and headphone-wearers)
WOOPWOOPWOOPWOOPWOOP
...
PING
PING
VEHICLE IN TRANSIT
PING
VEHICLE IN TRANSIT
PING
VEHICLE IN TRANSIT
(inaudible subsonic vibration to alert hearing impaired and headphone-wearers)
WOOPWOOPWOOPWOOPWOOP
...
PING
It would be cool to use AI to recognize humans and then use beam steering to give them targeted directional sound.
My vote is on the signature 1910s car horn: "aaooogah!" every 3 minutes or so.
Each time this discussion pops up, Domino's electric scooter safety noise starts playing in my head.
https://youtu.be/n17B_uFF4cA
https://youtu.be/n17B_uFF4cA
If I'd drive a car, which is a dangerous thing on its own, I'd be for minimizing the risks of harming someone or myself. My current mitigation of this risk is not driving a car at all.
The recent advert where Arnie is trying to convince people to buy ICE cars (as a prank) puts this in perspective. He rocks up in a Hummer that is making normal car noises, the noises that car drivers like:
https://www.youtube.com/watch?v=rXodSqMpuUQ
..but in this advert the noises sound so naff and quite... noisy!
My vehicle of choice is a bicycle and it is very quiet. But I have a bell. I can give a gentle ting to let people know I am behind them. It would be a little odd to me to have a bell that continually rattled just to inform anyone who I can't see that I am behind them.
How many guide dogs have I maimed and slaughtered? Zero. And this is sharing the same paths that people go on specifically to walk their dogs.
What next, someone walking sixty yards out in front with a red flag?
What happens if you live near a road that has slow moving traffic during rush hour? This could be nice and silent as it shuffles along. But it will be making these nanny noises from all the tin boxes.
Apart from anything else I thought it was a solved problem of having cars stop if something is in the way? Automatic collision avoidance?
Can't we have that and a softer 'bell' instead of the aggressive 'horn'?
https://www.youtube.com/watch?v=rXodSqMpuUQ
..but in this advert the noises sound so naff and quite... noisy!
My vehicle of choice is a bicycle and it is very quiet. But I have a bell. I can give a gentle ting to let people know I am behind them. It would be a little odd to me to have a bell that continually rattled just to inform anyone who I can't see that I am behind them.
How many guide dogs have I maimed and slaughtered? Zero. And this is sharing the same paths that people go on specifically to walk their dogs.
What next, someone walking sixty yards out in front with a red flag?
What happens if you live near a road that has slow moving traffic during rush hour? This could be nice and silent as it shuffles along. But it will be making these nanny noises from all the tin boxes.
Apart from anything else I thought it was a solved problem of having cars stop if something is in the way? Automatic collision avoidance?
Can't we have that and a softer 'bell' instead of the aggressive 'horn'?
I have this little fantasy where the car makers start selling a "big engine" noise as an optional extra to replace the default sewing machine noise, and then someone hacks it and cars start sounding like this https://www.youtube.com/watch?v=oNnRGtVkr6E
Honestly I've been kind of expecting Tesla to have that as an Easter egg at some point.
how about this https://youtu.be/hkmHWLwzl1s ?
At this point not too different algorithms from what we use for self driving could detect situations where noise would be helpful to air safety.
For example a crowded downtown road in rush hour. People will obviously know there are cars in the street. Why add to urban noise pollution.
Or even if there are cars in front of you and behind you, you probably don’t need sounds.
For example a crowded downtown road in rush hour. People will obviously know there are cars in the street. Why add to urban noise pollution.
Or even if there are cars in front of you and behind you, you probably don’t need sounds.
Our Pacifica PHEV has this. I was a bit disappointed when I learned that we couldn't have 100% silent EV mode (below 20 MPH or whatever), but it's not too bad.
I wonder if this is a transitional feature that can be phased out as EVs become more prevalent.
I wonder if this is a transitional feature that can be phased out as EVs become more prevalent.
I wonder if there should be some kind of override for places where silence is valued? Driving by folks watching a remote sunset? Driving in a cemetery or by a funeral? Slow Wildlife drives?
I had use of a Nissan Leaf for a couple of months. It made a loud chirping noise when in reverse. Anytime I'd back out of my driveway early in the morning, I knew I was annoying my neighbors but there wasn't anything I could do about it. It would have been nice to have the option to turn it off and just be more aware of my surroundings while backing up.
> there wasn't anything I could do about it
Reverse into the driveway when you park in the evening so you don’t have to reverse out in the morning?
Reverse into the driveway when you park in the evening so you don’t have to reverse out in the morning?
You mean like driving by people taking a stroll in the city or passing a whole front of houses where people chill in their rooms with the windows open for airflow? As in, the whole city. It's an unfortunate trade-off and we should should keep an eye out for better solutions.
Are there any things that don't traditionally make noise that we should also add noise to? Sharp drops near pedestrian areas? Bicycles? Low hanging branches over walkways?
Pedestrians are not 3 tons of steels that run you over.
Bycicles have bells. On shared paths, pedestrians don't hear cyclists coming from behind, so you occasionally give them a ping.
Bycicles have bells. On shared paths, pedestrians don't hear cyclists coming from behind, so you occasionally give them a ping.
Cars have horns.
Note that I'm not advocating for adding noise to these things. I'm just trying to point out that there's a status-quo bias where we're willing to retain unnecessary noise but not to create it.
Note that I'm not advocating for adding noise to these things. I'm just trying to point out that there's a status-quo bias where we're willing to retain unnecessary noise but not to create it.
Turns out that by removing it, we’ve discovered that the noise is necessary.
You only sound a horn if the driver thinks it is needed, whereas pedestrians & other vulnerable road users are making all sorts of judgements using audio clues that the drivers are completely unaware of.
You only sound a horn if the driver thinks it is needed, whereas pedestrians & other vulnerable road users are making all sorts of judgements using audio clues that the drivers are completely unaware of.
I don't think noise is necessary. It's only that people are used to noise. I usually wear sound isolating earphones outdors, so I don't hear cars as much now. But to compensate for that I look more around. That's something everyone could learn. Exception is those that are blind, but I think they should be able to get some help from technology to warn them from cars.
I think my preferred policy would be to mandate this noise for now and then slowly quieten it as people got used to quieter cars.
[deleted]
I hope they sound like tie fighters.
Can we also get a "a-woo-ga" sound for the horn?
If it's equal to or less than the volume of current motors, great! As any city dweller will know the real noise pollutant is mopeds anyway.
Yes! Mopeds, vans, lorries.
Most modern engines in cars going under 12mph are pretty quiet in terms of overall noise pollution.
I guess it's handy in car parks etc to be able to hear cars.
Most modern engines in cars going under 12mph are pretty quiet in terms of overall noise pollution.
I guess it's handy in car parks etc to be able to hear cars.
Car parks, etc, are exactly what this is needed for. Any places where pedestrians and vehicles interact. Likewise narrow lanes in European villages and city centres.
"The charity Guide Dogs - which had complained it was difficult to hear low-emission cars approaching - welcomed the change, but said electric vehicles should make a sound at all speeds."
I think this is a point worth noting - for people with visual impairments, this could be a potentially life-threatening situation they have to deal with on a day-to-day basis.
I think this is a point worth noting - for people with visual impairments, this could be a potentially life-threatening situation they have to deal with on a day-to-day basis.
My Chevy Bolt EV has one of these sound generators that kicks on at low speeds (20mph or below, I believe). It sounds like a small electric fan, like a very quiet hair dryer. I cannot hear it in the cabin unless I have a window rolled down and I am near a sound-reflecting surface, such as a building. I think it's a reasonable compromise.
Good. I've been calling Priuses and Teslas silent killers for years now. Can't tell you how many times I've almost been run over by one, despite the fact that I'm always looking around when near cars. Sound is an important part of situational awareness.
Maybe once all the cars are self driving we can get rid of the sound.
Maybe once all the cars are self driving we can get rid of the sound.
What I noticed standing by a busy street is that EVs are just as noisy as regular cars at speed.
Turns out the actual numbers are not obvious:
https://insideevs.com/news/330043/quiet-car-rule-new-evs-mus...
You could invert the formula and instead of walking ride a harley (loud pipes save lives, man) :)
Turns out the actual numbers are not obvious:
https://insideevs.com/news/330043/quiet-car-rule-new-evs-mus...
You could invert the formula and instead of walking ride a harley (loud pipes save lives, man) :)
Priuses already emit pedestrian warning sounds when driving on electric power. Teslas do not, yet.
As someone seriously considering a Tesla Model 3, this would turn me off from the car entirely. From a consumer perspective, this would make the car seem more like a toy than the silent, efficient machine I expect to buy. In fact, its silence is a selling point to me.
Someone pointed out that it would also make sense to wear helmets while riding in cars.
I’ve always heard the manufactures push for this because it lets marketing have the car constantly emit a trademarked, branded tone. People wouldn’t put up with such in-your-face crass advertising unless it was legally mandated.
If some people are bothered by the noise, can't we just make the noise directional, to the front?
And perhaps shut off the noise on highways (where there are no pedestrians/cyclists anyway).
And perhaps shut off the noise on highways (where there are no pedestrians/cyclists anyway).
I find that tire noise is enough to alert me even at very low speeds. Modern tires are stupid loud.
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Please let it be Wagner's Ride of the Valkyries.
I know the right guy for the job https://www.youtube.com/watch?v=Kj5IGSb-W18
Hans Zimmer is composing the sound for BMW's electric vehicles. Zimmer is the guy behind soundtracks for The Dark Knight, Inception and Interstellar.
This sounds like it's coming right out of the Onion, so I looked it up. Apparently he composed sounds for a concept car, so I'll wait and see if that has anything to do with the actual release models.
The BMW sounds are played though the car’s internal speakers to stimulate “emotional driving”. Jaguar also do this on the I-Pace.
This is different from what is being required by the new EU (and US) rules, which require external speakers to emit pedestrian warning noise.
This is different from what is being required by the new EU (and US) rules, which require external speakers to emit pedestrian warning noise.
Honestly, that sucks
Why?
* The "noise" will be a sound designed by sound specialists.
* The designers will be smart enough to design sounds that increase safety without being needlessly loud.
* Since the low frequencies of an ICE are not directional, a sound at higher frequencies (which is directional) is going to be an improvement. [edit: ICE frequencies are not as low as thought, so this point isn't too strong.]
* The motor sound of an ICE is only the dominant noise component at low speeds. Most of the time, the noise of the wheel on the asphalt dominates. At high speeds, the aerodynamic noise becomes dominant.
As a pedestrian and cyclist I'm quite happy to be able hear the 2 tons of battery that are coming up from behind. And the one person I know who drives a Tesla will also be happy about this. He had a close call with a cyclist once because the cyclist didn't hear him.
* The "noise" will be a sound designed by sound specialists.
* The designers will be smart enough to design sounds that increase safety without being needlessly loud.
* Since the low frequencies of an ICE are not directional, a sound at higher frequencies (which is directional) is going to be an improvement. [edit: ICE frequencies are not as low as thought, so this point isn't too strong.]
* The motor sound of an ICE is only the dominant noise component at low speeds. Most of the time, the noise of the wheel on the asphalt dominates. At high speeds, the aerodynamic noise becomes dominant.
As a pedestrian and cyclist I'm quite happy to be able hear the 2 tons of battery that are coming up from behind. And the one person I know who drives a Tesla will also be happy about this. He had a close call with a cyclist once because the cyclist didn't hear him.
Here's a little thought experiment to test whether or not it's a bad idea.
Imagine the noise is optional. As a driver you can turn it off. However, when the noise is switched off giant spikes pop out from the car's body that are guaranteed to kill anyone who gets in the way.
Do you think it would ever be acceptable for someone to drive with the noise switched off?
Imagine the noise is optional. As a driver you can turn it off. However, when the noise is switched off giant spikes pop out from the car's body that are guaranteed to kill anyone who gets in the way.
Do you think it would ever be acceptable for someone to drive with the noise switched off?
I read that as “let’s cut corners instead of building/improving roads”.
What sort of road building / improving did you have in mind?
We’re talking about city centre slow (<12mph) driving, I’m really not sure what road improvements could improve safety of silent cars?
We’re talking about city centre slow (<12mph) driving, I’m really not sure what road improvements could improve safety of silent cars?
My bad. I completely missed the point and thought they would make them noisy in general.
I wonder how they will solve the noise problem if it’s just slow moving traffic.
I wonder how they will solve the noise problem if it’s just slow moving traffic.
Probably a lot can be done to help safety without adding noise. Maybe something as simple as warning signs for silent cars can help.
So the road should create the sounds? or have some lights or other SciFi or software+hardware combination when a simple solution is possible.
I think roads should emit high energy lasers to prevent pedestrians to step on the road if the area is not designed to cross the road. :)
Kidding. I was thinking like adding more guidance for pedestrians and prevent them jumping on the road with pre-cautions but guess I missed the point since the news says when they are under 12 mph and reversing.
Kidding. I was thinking like adding more guidance for pedestrians and prevent them jumping on the road with pre-cautions but guess I missed the point since the news says when they are under 12 mph and reversing.
Although I have encountered quite a lot of "lazy" pedestrians who just cross the street immediately instead of waiting a few seconds for the car ('the car' means there is only a single one) to pass, I don't think that this is causing the majority of collisions. More likely someone took a right or left turn and didn't see the pedestrian because the drivers have to pay attention to multiple things at the same time.
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If you are not looking both ways when you are crossing a street, even in a parking lot, you are irresponsible. You shouldn’t be surprised by a big, predictably there object.
It is not that simple. Sound enhances the situational awareness especially when people are used to it for like forever.
What if you are visually impaired?
Then you cross at a crosswalk which is alerting you that you have the right of way.
Have you seen English roads?
Here's an example.
https://www.google.co.uk/maps/@51.900949,-2.0723105,3a,75y,3...
You'll see of these four roads meeting at a crossroad only one of them has a crossing. Pedestrians have absolute right of way on zebra crossings. The car driver is committing an offence if the fail to stop for a pedestrian on a zebra crossing. Many drivers don't know this and they don't stop or slow down, which is why the sounds are needed - to stop visually impaired people stepping in front of a car that has no chance of stopping in time.
Notice that two of the other roads have dropped curbs and textured paving. Rule 172 of the Highway Code mean that pedestrians also have priority on those roads, but this isn't well known. Someone stepping off the curb there in front of a moving vehicle is at risk of harm, even though they have priority.
What should a person standing on the near right corner wishing to cross to the far right corner do? Just use that crossing that's there? Or cross to the near left, then use zebra crossing, then cross to far right corner?
Here's an example.
https://www.google.co.uk/maps/@51.900949,-2.0723105,3a,75y,3...
You'll see of these four roads meeting at a crossroad only one of them has a crossing. Pedestrians have absolute right of way on zebra crossings. The car driver is committing an offence if the fail to stop for a pedestrian on a zebra crossing. Many drivers don't know this and they don't stop or slow down, which is why the sounds are needed - to stop visually impaired people stepping in front of a car that has no chance of stopping in time.
Notice that two of the other roads have dropped curbs and textured paving. Rule 172 of the Highway Code mean that pedestrians also have priority on those roads, but this isn't well known. Someone stepping off the curb there in front of a moving vehicle is at risk of harm, even though they have priority.
What should a person standing on the near right corner wishing to cross to the far right corner do? Just use that crossing that's there? Or cross to the near left, then use zebra crossing, then cross to far right corner?
The right of way doesn't protect you from injury.
I live in the Netherlands and there are electric cars here that already make these sounds. Its like a really faint 'vmmm' found. Its great because when I'm cycling I can hear a car coming up behind me, but its still way softer then regular car sounds so its still a decrease in night noise pollution vs regular cars (the 'vmmm' is really soft and doesn't carry far).
I also noticed it already when walking around parking lots, if there wasn't a 'vmmm' i would never realize that there are cars driving around. Sound really is one of the most important senses for situational awareness.
(I live in the City where cars crawl around slowly so the sounds are active)