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Rayleigh disk
noun
, Acoustics, Mechanics.
- a small circular disk, usually of mica, that is suspended from a fiber and tends to be deflected at right angles to a stream of air, indicating by its deflection the intensity of a sound wave.
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Word History and Origins
Origin of Rayleigh disk1
First recorded in 1910–15; named after J. W. S. Rayleigh
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