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Acoustic Mirrors
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Educational Use
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Students play and record the “Mary Had a Little Lamb” song using musical instruments and analyze the intensity of the sound using free audio editing and recording software. Then they use hollow Styrofoam half-spheres as acoustic mirrors (devices that reflect and focus sound), determine the radius of curvature of the mirror and calculate its focal length. Students place a microphone at the acoustic mirror focal point, re-record their songs, and compare the sound intensity on plot spectrums generated from their recordings both with and without the acoustic mirrors. A worksheet and KWL chart are provided.

Subject:
Math
Physical Science
Physics
Science
Material Type:
Activity/Lab
Provider:
TeachEngineering
Author:
Nick Breen
Steven C. Thedford
Date Added:
05/07/2018