Pennsylvania State University
Applied Physics: Model Analysis of an Electric Guitar
Great site explores the physics behind an electrical guitar. Outlines process for conducting an experiment on sound vibrations and provides animated GIF movies showing the first five modes of vibration.
Creative Science Centre
Creative Science Centre: A Voice on a Sunbeam
Here is described a simple process to 'put a voice on a sunbeam' and transmit it over a distance. It is a fascinating example of amplitude modulation of light using sound vibrations. It then describes how the modulated light is detected...
Other
Jiskha Homework Help: Jiskha Homework Help!
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OpenStax
Open Stax: Catherine Schmidt Jones: Sound and Music
Introduce some activities that introduce students to the physics of sound. They will also learn how various instruments produce sound. Included are downloadable pdf worksheets and answer sheets to use.