| 发明名称 |
Noise-canceling differential microphone assembly. |
| 摘要 |
<p>Improved microphone performance is achieved by configuring a second-order derivative microphone assembly in such a way that radially divergent near-field input produces a microphone response proportional to a first-order spatial derivative of the acoustic pressure field. <IMAGE></p> |
| 申请公布号 |
EP0679044(A2) |
申请公布日期 |
1995.10.25 |
| 申请号 |
EP19950302429 |
申请日期 |
1995.04.12 |
| 申请人 |
AT&T CORP. |
发明人 |
BARTLETT, CHARLES SPURGEON;ZUNIGA, MICHAEL ANTHONY |
| 分类号 |
H04R1/40;H03H21/00;H04M1/03;H04M1/19;H04R;H04R3/00;H04R29/00;(IPC1-7):H04R3/00 |
主分类号 |
H04R1/40 |
| 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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