Annoying sounds from cars at stop light

geof

You are correct about the sound waves. In your room they travel through the air, when they hit the sheetrock they are traveling through a different medium which has a different speed through which those waves travel, then air again 3.5" then the sheetrock again, then into the air again. Lots of moving parts. 
I was trying to discover the speed with which air travels through sheet rock but couldn't locate that info. I did find info that suggests that the resonance of sheet rock is about 70 hz which is probably why we hear louder bass on the other side of a wall and why that is so distorted. 

I would bet the MDF used in most speakers does much of the same.

I got the answer to the punks that have the loud bass and the fart can on the tail pipe. My truck is a Dodge Ram with a straight pipe on my Cummins. And if the truck isn't loud enough I turn on the exhaust brake. And with that because the noise and smell they shut there windows.

gaddodge

You are doing Gods work............except for the exhaust fumes........not sure he would approve....

I can't control the exhaust fumes

kidding about that...