Imagining building a bridge and then in the middle someone comes along and says it should also be a tunnel
While converting a bridge to tunnel mid-construction doesn't happen, what does often happen is that design assumes a particular construction technique can be used, construction starts with that technique, and midway through it's determined that an entirely different technique is required. This results in a bunch of redesign, remobilization, etc. Just like with software, construction often does not survive first contact with reality.
noise pollution (it’s really worth watching Benn Jordan’s video on infrasound,)
Noise from data centers is a real issue, but Benn's measurements and analysis are not great (speeding up the sample rate to demonstrate frequency effects is just wrong, among other issues).
Spring 2020, they released the iPhone SE 2020, 4 years after the previous iPhone SE. This satiated a lot of the demand for people holding out for a smaller phone.
Count me in this group. I wound up buying the 13 mini right before it was going to be discontinued because I knew that would be the last small phone they would produce and I'm keeping it until it dies (or I can't get a battery for it).
If you're going through the hassle of reseting your iPhone to set with Configurator, you should think about pair locking your phone while you're at it:
You can tell roughly how far away a sound source is by measuring the curvature of the wavefront, since sound radiates out in a sphere. The farther away you are, the lower the parallax between two sensors.
That only works in the free field. In a small room (defined as dimensions being larger than ~1/6th to 100% of a wavelength) you no longer have waves, the entire room is pressurized. And as you mentioned, modal behavior is also an issue.
If you're trying to measure the parallax of outdoor (free field) waves, that works in a truly free field, but once you have reflections (from, say, the ground) you have to account for that as well.
First thing: unless that middle air gap is very wide (10+ inches), you've just created a resonant chamber that almost completely negates the sound reducing performance of the two double-pane layers. This is way party walls consisting of two separately framed walls (drywall-stud-drywall-gap-drywall-stud-drywall) tend to be very poor at blocking sounds between units.
There are other issues regarding the impedance mismatch between the outside and middle air gap openings.
Which is the same constraint as pretty much any other physical item one might purchase. "reasonably a forever" is a reasonable description.