发明授权
- 专利标题: Sound absorber
- 专利标题(中): 吸声器
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申请号: US260232申请日: 1994-06-14
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公开(公告)号: US5512715A公开(公告)日: 1996-04-30
- 发明人: Hiroyuki Takewa , Yutaka Torii
- 申请人: Hiroyuki Takewa , Yutaka Torii
- 申请人地址: JPX Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX5-142481 19930615
- 主分类号: E04B1/99
- IPC分类号: E04B1/99 ; E04B1/84 ; E04B1/86 ; G10K11/16 ; G10K11/162 ; G10K11/168 ; G10K11/172 ; E04B1/82
摘要:
A sound absorber arrangement includes a plurality of sound absorbing layers of porous materials such as glass wool, rock fiber or cellular plastic, and high-polymer films, are alternately laminated in a direction perpendicular to a sound incidence plane. The layer thicknesses are increased in order in a direction away from the sound incidence plane. The sound absorber arrangement makes it possible to make a sound absorbing coefficient constant over the low to high frequency sound range.
公开/授权文献
- US6028799A Memory circuit voltage regulator 公开/授权日:2000-02-22
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