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Sound measuring apparatus and method, and audio signal processing apparatus

  • US 20070086597A1
  • Filed: 10/04/2006
  • Published: 04/19/2007
  • Est. Priority Date: 10/18/2005
  • Status: Active Grant
First Claim
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1. A sound measuring apparatus for measuring a sound-arrival delay time from a speaker to a microphone on the basis of a result obtained by outputting a test signal from the speaker and picking up the test signal using the microphone, the sound measuring apparatus comprising:

  • control means for performing control so that the test signal is expanded in a time axis and is then output from the speaker; and

    delay time measuring means for measuring an expansion-based measured delay time on the basis of a delay time that is measured on the basis of a time difference between the test signal expanded in the time axis and output from the speaker and a signal obtained from the microphone by picking up the output expanded test signal, thereby obtaining the sound-arrival delay time as the expansion-based measured delay time.

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