METHOD AND DETECTOR OF LOUDSPEAKER DIAPHRAGM EXCURSION

  • US 20140241536A1
  • Filed: 02/27/2013
  • Published: 08/28/2014
  • Est. Priority Date: 02/27/2013
  • Status: Active Grant
First Claim
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1. A method of detecting diaphragm excursion of an electrodynamic loudspeaker, comprising steps of:

  • generating an audio signal for application to a voice coil of the electrodynamic loudspeaker,adding a high-frequency probe signal to the audio signal to generate a composite drive signal,applying the composite drive signal to the voice coil through an output amplifier, detecting a modulation level of a probe signal current flowing through the voice coil.

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