WAVES AND OSCILLATIONS - WAVE MOTION - INTER. AND DIFF. OF SOUND NC State University Faculty Access

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Baffles and Resonators
# 3B55.31


Description: A tuning fork held in the hand and struck with a rubber mallet emits a feeble sound audible for only a few feet, owing to destructive interference between different trains of waves generated by the fork. It is possible to eliminate much of the interference and make the fork sound loudly by holding it in front of a slit cut in a piece of cardboard. The fork should be held close to the cardboard but not in contact with it, with the plane of its prongs either parallel or perpendicular to the cardboard.

Instructions:

Purchased/Built: built

Setup Time: none

Quant. in Demo Room: 1

Demo References
Sutton S-109 Hold a tuning fork in the hand with and without a cardboard baffle.
Meiners 19-4.10 A baffle is held between the forks of a tuning fork on a resonator box with the open end facing toward and away from the class.

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