发明名称 |
HYBRID ACTIVE SILENCER |
摘要 |
<p>Acoustic attenuation apparatus (2) is provided for a duct (4) guiding an acoustic wave propagating (6) therethrough. A silencer (8) is provided for passively attenuating the acoustic wave in the duct, and a cancelling speaker (32) is provided within the silencer. The combination provides hybrid active/passive combined attenuation. Various rectangular and circular structures are disclosed, together with multi-path and multi-speaker arrangements.</p> |
申请公布号 |
CA1255608(A) |
申请公布日期 |
1989.06.13 |
申请号 |
CA19860525783 |
申请日期 |
1986.12.18 |
申请人 |
NELSON INDUSTRIES, INC. |
发明人 |
ERIKSSON, LARRY J.;ALLIE, MARK C.;HOOPS, RICHARD H. |
分类号 |
G10K11/178;(IPC1-7):G10K11/16 |
主分类号 |
G10K11/178 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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