This is a demonstration of standing sound waves in a tube that is open at both ends and is rotated about one end. The tube moves through higher and higher harmonics as its rotation rate increases.

This demonstration was created at Utah State University by Professor Boyd F. Edwards, assisted by James Coburn (demonstration specialist), David Evans (videography), and Rebecca Whitney (closed captions), with support from Jan Sojka, Physics Department Head, and Robert Wagner, Executive Vice Provost and Dean of Academic and Instructional Services.

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