whooooosh·vor 9 Monaten·discussMore like 'related'.That's a statement from the PSF.This is a personal blog post of one of its board members.
whooooosh·vor 9 Monaten·discussYou can look on youtube for any number of videos showing you what it sounds like to be near one of these centers.For example,https://www.youtube.com/watch?v=AHPKPmoW910