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Article Dans Une Revue European Journal of Physics Année : 2007

Visualization of sound waves using regularly spaced soap films

Florence Elias
Stefan Hutzler

Résumé

We describe a novel demonstration experiment for the visualization and measurement of standing sound waves in a tube. The tube is filled with equally spaced soap films whose thickness varies in response to the amplitude of the sound wave. The thickness variations are made visible based on optical interference. The distance between two antinodes is easily measured using a ruler and the determined wavelengths of the modes of the standing wave are in excellent agreement with the theory.

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hal-00168749 , version 1 (30-08-2007)

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Florence Elias, Stefan Hutzler, Mauro S. Ferreira. Visualization of sound waves using regularly spaced soap films. European Journal of Physics, 2007, 28 (4), pp.755-765. ⟨10.1088/0143-0807/28/4/014⟩. ⟨hal-00168749⟩
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