Vehicle radio automatic volume adjustment system
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United States of America Patent
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Aug 27, 1996
Grant Date -
N/A
app pub date -
Aug 10, 1994
filing date -
Aug 27, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates generally to a method for adjusting the volume of a vehicle radio to the surrounding noise level, where the audio signal level, sampled downstream of a setting element (2), placed in the path of the audio signal, and a driving noise signal level (FG) are supplied to a control loop (1, 2, V1) that attempts to minimize the difference between the audio signal level and the driving noise signal level. To prevent the signal level from running up during a signal pause and a driving noise level at hand, an audio signal pause recognition is provided which identifies low-signal audio passages as pauses, using a variable threshold, and slowly lowers the audio signal level during these pauses.
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