Sound absorber and sound absorbing device

a technology of sound absorber and sound absorber, which is applied in the direction of sound producing device, instruments, flooring, etc., can solve the problems of insufficient sound absorber sound absorber, insufficient see-through capability, and insufficient reflection light to see the inside through, so as to achieve good sound absorber ability and reduce nois
US20060260870A1Inactive Publication Date: 2006-11-23NAGATA KOSAKUSHO CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
NAGATA KOSAKUSHO CO LTD
Publication Date
2006-11-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

A sound absorber according to the present invention comprises: a tubular porous sheath with a non-circular cylindrical cross-section; a circular cylindrical soft fiber sound absorbent disposed inside the porous sheath in partial contact or non-contact with the porous sheath with the longitudinal direction thereof aligned with the longitudinal direction of the porous sheath; and a bar-like core with a non-circular cylindrical cross-section disposed inside the soft fiber sound absorbent in a partial contact or non-contact with the soft fiber sound absorbent with the longitudinal direction thereof aligned with the longitudinal direction of the soft fiber sound absorbent. A sound absorbing device according to the present invention comprises a plurality of the sound absorbers arranged side by side at specific intervals in two or more rows in a staggered configuration. Alternately, a plurality of sound absorbers having a generally isosceles trapezoidal cross-section are arranged in a row with the upper and lower bases of the isosceles trapezoidal cross-sectional shape thereof exposed to the outside alternately.
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Description

CROSS REFERENCE OF RELATED APPLICATIONS

[0001] The disclosure of Japanese Patent Application No. 2005-084833 (filed on Mar. 23, 2005) including the specification, claims, drawings and abstract is incorporated herein by reference in its entirety. BACKGROUND OF THE INVENTION

[0002] 1. Field of Invention

[0003] The present invention relates to a sound absorber for use in a sound insulating wall for absorbing noise, and a sound absorbing device using the sound absorber.

[0004] 2. Background Art

[0005] Various types of sound absorbers and sound absorbing devices are used to absorb noise generated by large machines or vehicles running on highways and railroad tracks. Conventionally, board-like sound absorbing panels composed of a thin film bag filled with a soft fiber sound absorbent and porous plates are widely used in sound absorbing devices. Recently, a circular cylindrical sound absorber having an improved sound absorbing ability and a sound absorbing device using the sound absorbers ...

Claims

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