发明名称 |
ACTIVE HEADSET WITH BRIDGE AMPLIFIER |
摘要 |
An active headset providing for reduction of external noise over a given frequency range by a microphone which generates an external noise cancellation signal spectrum, wherein a bridge amplifier circuit is interposed between the microphone (10) and the loudspeaker (20) and the gain of the bridge amplifier for peak amplitude of the noise cancellation signal is user adjustable (30) without substantially reducing the breadth of the given frequency range over which noise reduction is effective.
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申请公布号 |
WO9848737(A9) |
申请公布日期 |
1999.03.25 |
申请号 |
WO1998US07948 |
申请日期 |
1998.04.20 |
申请人 |
NOISE CANCELLATION TECHNOLOGIES, INC. |
发明人 |
JONES, OWEN |
分类号 |
A61F11/14;G10K11/178;(IPC1-7):A61F2/20;H03B29/00 |
主分类号 |
A61F11/14 |
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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