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ADAPTIVE ROOM EQUALIZATION USING A SPEAKER AND A HANDHELD LISTENING DEVICE

  • US 20160029142A1
  • Filed: 03/13/2014
  • Published: 01/28/2016
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. A method for adjusting sound emitted by a loudspeaker in a room, comprising:

  • driving one or more transducers to emit sounds based on a first segment of an audio signal;

    characterizing the spectral characteristics of the first segment;

    receiving, by the loudspeaker, a sensed audio signal from a handheld device, wherein the sensed audio signal represents the sounds emitted by the one or more transducers corresponding to the first segment of the audio signal;

    estimating, by an adaptive filter, an impulse response for the room based on the first segment of the audio signal;

    determining an error value for the estimated impulse response based on the sensed audio signal;

    storing the impulse response and the spectral characteristics of the first segment in response to the error value being below a predefined error level and the impulse response being within a tolerance level of one or more previously stored impulse responses; and

    processing a second segment of the audio signal based on one or more stored impulse responses in response to determining the stored spectral characteristics corresponding to the one or more stored impulse responses cover a predefined spectrum.

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