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1. 发明授权

US6061455A Audio system 失效
标题翻译：音响系统
公开(公告)号：US6061455A
公开(公告)日：2000-05-09
申请号：US879479
申请日：1997-06-20
申请人： Darby Edward Hadley , David John Smart
发明人： Darby Edward Hadley , David John Smart
IPC分类号： H03G7/08 , H03G3/20
CPC分类号： H03G7/08
摘要： An audio system for a vehicle comprises an audio amplifier 14 and a manually adjustable volume control 18 for setting the output level of the sound generated by a loudspeaker 20 connected to the output of the amplifier 14. The amplifier 14 includes distortion sensing means for detecting when the level of distortion of the output signal of the amplifier 14 exceeds a reference threshold and a control circuit 16 reduces the sound output level of the amplifier in response to a signal from the distortion sensing means. The reference threshold of the distortion sensing means 14 is varied in dependence upon the output level setting of the volume control 18 so that the allowable output distortion can be varied based upon user input.
摘要翻译：用于车辆的音频系统包括音频放大器14和可手动调节的音量控制器18，用于设置连接到放大器14的输出端的扬声器20产生的声音的输出电平。放大器14包括用于检测何时放大器14的输出信号的失真电平超过参考阈值，并且控制电路16响应于来自失真感测装置的信号而降低放大器的声音输出电平。失真检测装置14的参考阈值根据音量控制器18的输出电平设置而变化，从而可以基于用户输入来改变可允许的输出失真。

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