I was in the shower while my roommate was listening to music and got to thinking about the fact that I could only hear the bass and lower drums through the walls. Why is this? The two possibilities I could think up were:
For some reason, sound waves at low frequencies (if I remember this means a lower pitch) are better at traveling through solids.
The bass sound waves are slightly vibrating the walls themselves, and this is somehow producing sound waves in the air on the other side of the wall.
I have no clue if either are on the right track, and I'd really love to know!