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In the Theater of Epidaurus, Greece, the regular spacing of the risers behind the seats causes unusual sound reflections.
A surface wave showing a sound interference pattern caused by two vibrating sources in water.

The Nature of Sound

A Catalog of Sounds

Molecules, Waves, Sounds

A Myth Exposed

Acoustic Wave Spectrum

Accoustic Wave Spectrum (.pdf)
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The Tide from String Quartet No. 4 (2:07)

The Tide (Real Audio)
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The Tide (MP3)

Notes for 'The Tide'