发明名称 |
Directional microphone arrangement |
摘要 |
A directional microphone arrangement has a number of discrete microphones each having an electrical output and elements for deriving first and second electrical signals which are 180 DEG out of phase with respect to each other from the outputs of the microphones. A third signal is also derived through differentiation from one of the microphone outputs which is 90 DEG out of phase with respect to one of the first or second signals. All of the first, second and third signals are added in a summing unit, the output of the summing unit forming the output for the arrangement.
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申请公布号 |
US4712244(A) |
申请公布日期 |
1987.12.08 |
申请号 |
US19860918497 |
申请日期 |
1986.10.14 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
ZWICKER, EBERHARD;BECKENBAUER, THOMAS;BEER, GUENTHER |
分类号 |
H04R5/027;H04R1/02;H04R1/40;H04R3/00;H04R5/04;H04R25/00;H04R25/02;(IPC1-7):H04R25/00;H04R1/20;H04R1/04 |
主分类号 |
H04R5/027 |
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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