ACOUSTICALLY TRANSPARENT MEMBER AND METHOD FOR DESIGNING SAME

Title:

ACOUSTICALLY TRANSPARENT MEMBER AND METHOD FOR DESIGNING SAME

Document Type and Number:

WIPO Patent Application WO/2017/163804

Kind Code:

A1

Abstract:

In order to provide an acoustically transparent member that has an acoustically transparent band with an appropriate extent in a high frequency region and assures constant strength, an acoustically transparent member 10 is so configured that a core layer 104 is laminated between two skin layers 102A and 102B, and the skin layers 102A and 102B are formed of material with a higher degree of elasticity than a degree of elasticity of the core layer 104. A thickness ds of the skin layers satisfies the following formula (1) with respect to a center frequency f of a transparent frequency band, a sound velocity cw inside a medium surrounding the acoustically transparent member 10, a wavelength λ corresponding to the center frequency inside the medium, a longitudinal wave sound velocity cds inside the skin layers, and any natural number n.

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Inventors:

TADOKORO MASATO (JP)
TANAKA YUSUKE (JP)

Application Number:

PCT/JP2017/008274

Publication Date:

September 28, 2017

Filing Date:

March 02, 2017

Export Citation:

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Assignee:

YOKOHAMA RUBBER CO LTD (JP)

International Classes:

B32B7/022; G01S7/521; B63B49/00

Foreign References:

US4997705A	1991-03-05
JP2015098086A	2015-05-28
US20150369907A1	2015-12-24
US6831876B1	2004-12-14
JPH0450683A	1992-02-19

Other References: