Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 26, 2019
Patent Application Number
13779314
Date Filed
February 27, 2013
Patent Citations Received
...
Patent Primary Examiner
Patent abstract
The present invention relates in one aspect to a method of detecting diaphragm excursion of an electrodynamic loudspeaker. The method comprises steps of generating an audio signal for application to a voice coil of the electrodynamic loudspeaker and adding a high-frequency probe signal to the audio signal to generate a composite drive signal. The method further comprises a step of applying the composite drive signal to the voice coil through an output amplifier and detecting a modulation level of a probe signal current flowing through the voice coil.
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