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Method of estimating diaphragm excursion of a loudspeaker

  • US 9,980,068 B2
  • Filed: 11/06/2013
  • Issued: 05/22/2018
  • Est. Priority Date: 11/06/2013
  • Status: Active Grant
First Claim
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1. A method of estimating an excursion of a diaphragm of a loudspeaker, comprising:

  • receiving an audio input signal and generating an audio output signal based on the audio input signal;

    applying the audio output signal to a coil of the loudspeaker;

    detecting a coil voltage and a coil current in response to the applied audio output signal;

    computing a plurality of parameters corresponding to the loudspeaker by applying information about the detected coil current and coil voltage to a linear model of the loudspeaker;

    interrupting the computing the plurality of parameters based on a result of a comparison of the audio input signal with a spectral criterion; and

    determining the excursion of the diaphragm of the loudspeaker by applying, to a non-linear model of the loudspeaker, the audio input signal and the plurality of parameters computed using the linear model of the loudspeaker.

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