ADAPTIVE ENVIRONMENTAL NOISE COMPENSATION FOR AUDIO PLAYBACK
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United States of America Patent
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Issued Date -
Oct 13, 2011
app pub date -
Apr 11, 2011
filing date -
Apr 9, 2010
priority date (Note) -
Abandoned
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Abstract
The present invention counterbalances background noise by applying dynamic equalization. A psychoacoustic model representing the perception of masking effects of background noise relative to a desired foreground soundtrack is used to accurately counterbalance background noise. A microphone samples what the listener is hearing and separates the desired soundtrack from the interfering noise. The signal and noise components are analyzed from a psychoacoustic perspective and the soundtrack is equalized such that the frequencies that were originally masked are unmasked. Subsequently, the listener may hear the soundtrack over the noise. Using this process the EQ can continuously adapt to the background noise level without any interaction from the listener and only when required. When the background noise subsides, the EQ adapts back to its original level and the user does not experience unnecessarily high loudness levels.
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