Patent ID: 9648432
Date: 2017-05-09
CPC Classifications: H04R

Claim:
1. A method of controlling sound reproduction of a loudspeaker, the method comprising: applying an audio signal to a coil of the loudspeaker; detecting a current flowing through the coil and a voltage across the coil; applying information about the detected current and detected voltage to an adaptive digital model of the loudspeaker to determine a resonance frequency of the loudspeaker, the determined resonance frequency of the loudspeaker based on one or more adaptive parameters of the adaptive digital model of the loudspeaker; calculating a frequency deviation by comparing the determined resonance frequency with a nominal resonance frequency of the loudspeaker representing a nominal acoustic operating condition of the loudspeaker; and attenuating a level of the audio signal applied to the coil based on the calculated frequency deviation.