Annoying sounds from cars at stop light


What causes the stereo in the car next to you at the stop light so loud and annoying with over the top bass and how can the driver stand it?

128x128soundsrealaudio

When one of those boom cars pulls up, it's like a giant sign blaring "Look at me!   I'm an a##hole and dumb as sh#t!"

(Sort of like Harley Riders, who don't give a damn that their bikes cause everyone's teeth to rattle within an entire block, 'cause, "I'm on a Harley!")

Usually of course it's young men and as we know they don't have a reputation for wise decisions at that point in life.   There's a lot of tinnitus and regret coming down the road for those guys. 
I don't think they hear it. They are listening to the speakers facing them, you are listening to the whole car resonating and turning into a huge speaker. Maybe we should have posit notes preprinted that say " Please turn that music down, I have a baby sleeping on the floor." 

Wonder if that would work. Probably not...
soundsrealaudio said:
" I was trying to discover the speed with which air travels through sheet rock but couldn't locate that info."

So, air travels through sheet rock at speed?
If this helps, the speed of sound in concrete is about 10 times the speed of sound in air.