The use of acoustic crystals for the inhibition of sound...

Details The use of acoustic crystals for the inhibition of sound... The use of acoustic crystals for the inhibition of sound...

G - Physics

10

K

G10K 11/16 (2006.01) B63G 8/34 (2006.01) G10K 11/162 (2006.01)

Patent

CA 2406325

This invention is concerned with a method of attenuating sound transmission in any medium (e.g. air, water, human tissue). The similarity of the scattering of light waves and acoustic waves by crystal-like structures is recognised. Accordingly, a method is devised to inhibit the transmission of sound using one or more intervening acoustic crystals placed in parallel or in series. An acoustic crystal is defined as an ensemble consisting of either (1) a two-dimensional array of straight rigid cylinders placed parallel, or (2) a three-dimensional array of rigid spheres. By customising the ensemble element (i.e. cylinder or sphere) dimensions, spacings, and properties (density, compressibility, and Poisson's ratio) different bands of the sound spectrum can be impeded according to the desired application.

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