发明名称 |
NOISE CANCELLATION APPARATUS |
摘要 |
Apparatus for reducing acoustic background noise for use with a telephone handset or a boom microphone device or the like. The apparatus includes first and second microphones which are arranged such that the first microphone receives a desired speech input and the background noise present in the vicinity of the speech, and the second microphone receives substantially only the background noise. The background noise from the second microphone is converted into a corresponding electrical signal and subtracted from a signal corresponding to the speech and background noise obtained from the first microphone so as to produce a signal representing substantially the speech.
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申请公布号 |
CA2109440(A1) |
申请公布日期 |
1994.04.30 |
申请号 |
CA19932109440 |
申请日期 |
1993.10.28 |
申请人 |
ANDREA ELECTRONICS CORPORATION |
发明人 |
ANDREA, DOUGLAS;TOPF, MARTIN |
分类号 |
G10K11/178;G10L21/02;H04B1/12;H04M1/00;H04M1/05;H04M1/19;H04M1/60;H04R1/10;H04R3/00;H04R3/02;H04R29/00;(IPC1-7):H04M1/74;H04M1/20 |
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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