发明名称 |
Hybrid active silencer |
摘要 |
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. |
申请公布号 |
US4665549(A) |
申请公布日期 |
1987.05.12 |
申请号 |
US19850811029 |
申请日期 |
1985.12.18 |
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):E04B1/99 |
主分类号 |
G10K11/178 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|