I found this cool little vid. I guess it's called a Rubens tube. Looks like a good aid in visualizing sound waves.
http://www.break.com/index/rubens_tube_expierment.html
O, and if you feel compelled to tell me this is a repost, you should save it and eat a dick instead...
http://www.break.com/index/rubens_tube_expierment.html
O, and if you feel compelled to tell me this is a repost, you should save it and eat a dick instead...