Created by Dale Olive and Randy Scoville
Future Flight Hawai`i instructors
Demonstration at a glance:
A tuning fork is struck and held against an empty soda can creating a violin type noise.
Any tuning fork will work although ones with square edge work best. Strike the tuning fork to get it vibrating. Hold one of the edges against the empty soda can, held like a violin, to create the noise. Usually I play jingle bells and try to have the kids guess what I'm playing. The reason for this selection is the nice succession of single notes at the beginning of the tune - the babooze violin after all can only hit one note!
Again, sound is nothing more than vibrations in the air. When the tuning fork is held against the can its small vibrations are amplified.
I will sometimes hold the tuning fork against other metal objects or empty glass beakers to demonstrate how other objects sound when they vibrate. This reinforces the concept that objects vibrating the air create sound.
Communications: Hawaii Space Grant Office
This activity is featured in Future Flight Hawaii, a K-12 Education Project of Hawaii Space Grant Consortium.
FEB 27 2001.