发明名称 |
Automatic gain and frequency characteristic control unit in audio device |
摘要 |
An automatic gain control unit particularly adapted for vehicular use is disclosed. The ambient noise level inside the vehicle is detected, as is the level of the audio signal. A difference is formed between detection signals thus produced, and a frequency characteristic of a gain varying device, inserted in an audio signal path of the audio device, is varied according to this difference.
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申请公布号 |
US4644292(A) |
申请公布日期 |
1987.02.17 |
申请号 |
US19850739953 |
申请日期 |
1985.05.31 |
申请人 |
PIONEER ELECTRONIC CORPORATION |
发明人 |
KUNUGI, YOSHIRO;ODAKA, MAKOTO;SATO, TAKESHI;SASAKI, YOSHIO;TOKUMO, AKIO |
分类号 |
H03G3/32;H03G5/18;(IPC1-7):H03G3/18 |
主分类号 |
H03G3/32 |
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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