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SOUND PROCESSING APPARATUS AND METHOD

  • US 20110142255A1
  • Filed: 11/30/2010
  • Published: 06/16/2011
  • Est. Priority Date: 12/11/2009
  • Status: Abandoned Application
First Claim
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1. A sound processing apparatus that adjusts, based on acoustic characteristics of a reproduced sound field, a frequency response of an acoustic signal to be output, the apparatus comprising:

  • an outputting unit configured to output, in a state where a volume value that specifies a volume to be output from a loudspeaker is set to a default value, pure tone signals of a plurality of frequencies at respectively different timings as test signals from the loudspeaker;

    an acquiring unit configured to acquire the respective test signals output by said outputting unit from the loudspeaker using a microphone;

    a controlling unit configured to reduce the volume value for each of the signals acquired by said acquiring unit when a signal level of a harmonic tone component is equal to or greater than a threshold so that the signal level of the harmonic tone component falls below the threshold, and to store, in a storage unit, the reduced volume value in association with a frequency of a test signal corresponding to the signal in question; and

    an adjusting unit configured to adjust the signal level of the acoustic signal at the frequency stored in said storage unit so that when outputting the acoustic signal, a product of a signal level of the acoustic signal at the stored frequency and a current volume value does not exceed a product of a signal level of a test signal at the stored frequency and a volume value stored in said storage unit in association with the stored frequency.

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