发明名称 |
Structured molded parts for sound absorption |
摘要 |
Structured pre-form bodies as panel lining for wide-band sound absorption are made of an open-cell foam material having a rigid framework co-vibrating in a resonant manner at low frequencies. The pre-form bodies have a base layer and a columnar structure positioned directly in front of or on the base layer. The columnar structure has a non-symmetrical distribution of height and cross-section, thereby forming a wide-band tuned moderator gap and the columnar height corresponds approximately to the density of the base layer. The columnar structure has a framework resonance adjustable as a function of parameters of the base layer.
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申请公布号 |
US6793037(B1) |
申请公布日期 |
2004.09.21 |
申请号 |
US20010868317 |
申请日期 |
2001.09.13 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |
发明人 |
BABUKE GERHARD;LEISTNER PHILIP;FUCHS HELMUT;ZHA XUEQIN |
分类号 |
E04B1/82;E04B1/84;(IPC1-7):E04B1/82 |
主分类号 |
E04B1/82 |
代理机构 |
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代理人 |
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地址 |
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