This has got some quite useful sciencey type info on acoustics of buildings on it, i know it's about classrooms but it's still quite relevant...
http://asa.aip.org/classroom/booklet.html

Also, found some info from the howstuffworks website we could transfer onto ours - the little animation thing at the bottom is pretty much all you need to look at i think...
http://science.howstuffworks.com/acoustic-levitation.htm