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US Patent & Trademark Office: United States Patent Application
Engadget found this 1/23/2009 on appft1.uspto.gov
METHOD AND APPARATUS FOR USING A SOUND SENSOR TO ADJUST THE AUDIO OUTPUT FOR A DEVICE
Engadget found this 1/23/2009 on appft1.uspto.gov
METHOD AND APPARATUS FOR USING A SOUND SENSOR TO ADJUST THE AUDIO OUTPUT FOR A DEVICE