| 发明名称 |
Directional speaker system |
| 摘要 |
A directional sounder emits audible outputs in a first direction. Audible outputs in a second direction are canceled. Two transducers can be carried in a common housing configured to emit outputs in the first and second directions respectively.
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| 申请公布号 |
US8457324(B2) |
申请公布日期 |
2013.06.04 |
| 申请号 |
US20050204956 |
申请日期 |
2005.08.16 |
| 申请人 |
TICE LEE D.;HONEYWELL INTERNATIONAL INC. |
发明人 |
TICE LEE D. |
| 分类号 |
G10K11/16 |
主分类号 |
G10K11/16 |
| 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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