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Audio system

  • US 6,061,455 A
  • Filed: 06/20/1997
  • Issued: 05/09/2000
  • Est. Priority Date: 06/21/1996
  • Status: Expired due to Fees
First Claim
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1. An audio system for a vehicle comprising an audio amplifier, a manually adjustable volume control for setting the output level of the sound generated by a loudspeaker connected to the output of the amplifier, distortion sensing means for detecting when the level of distortion of the output signal of the amplifier exceeds a reference threshold and means for reducing the sound output level of the amplifier in response to a signal from the distortion sensing means, characterised in that the reference threshold of the distortion sensing means is varied in dependence upon the output level setting of the volume control.

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