We discussed sounds we hear at school and determined which were Primary and which were Competing.
We worked like Acoustical Engineers to DAMP (quiet) sounds on a guitar we put together. We used felt, modeling clay, and aluminum foil to damp the vibrations. This week we used felt and aluminum foil to dampen the vibrations from a horn.
If you have time look up the youtube video of the iphone 4 inside of a guitar - you can see the strings vibrating in cool ways!