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Title:
SOUND ABSORPTION STRUCTURE BODY AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2022139729
Kind Code:
A
Abstract:
To provide a sound absorption structure body capable of reducing sound in a broad frequency band.SOLUTION: A sound absorption structure body comprises a main body which has a porous part which is opened on a surface side, and a resonator which is built in the main body, and has a cavity part and a neck part serving as a conduit reaching the cavity part from the surface side of the main body. The main body and resonator are formed, for example, in one body. The resonator, for example, has a plurality of cavity parts and neck parts, respectively. A cavity part is, for example, at least partially formed of a solid wall surface (shell). At least one of the neck parts may be a conduit bypassing an outer peripheral side of the cavity part. The resonator further may have a communication pipe linking two or more of the cavity parts. A sound absorption structure body like this is manufactured by, for example, a powder lamination method.SELECTED DRAWING: Figure 1A

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Inventors:
MASUTANI TAKASHI
NAKANO YUKIHITO
TOMITA SUNAO
SATO HARUKI
Application Number:
JP2021040236A
Publication Date:
September 26, 2022
Filing Date:
March 12, 2021
Export Citation:
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Assignee:
TOYOTA CENTRAL RES & DEV
International Classes:
G10K11/16; F02M35/12; F02M35/14; G10K11/162; G10K11/172
Domestic Patent References:
JP2006072129A2006-03-16
JPS5324801A1978-03-08
JPS60112952A1985-06-19
JP2015169050A2015-09-28
JP2019152837A2019-09-12
JPH09185381A1997-07-15
JP2018115364A2018-07-26
Attorney, Agent or Firm:
Masayuki Morioka
Sansui International Patent Office



 
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