Patent ID: 9258659
Filing Date: 2016-02-09
CPC Classification: H04R

Claim Text:
1. A method of detecting enclosure leakage of an electrodynamic loudspeaker mounted in an enclosure, comprising steps of: applying an audio signal to a voice coil of the electrodynamic loudspeaker through an output amplifier, detecting a voice coil current flowing into the voice coil, detecting a voice coil voltage across the voice coil, applying the detected voice coil current and the detected voice coil voltage to an adaptive digital model of the loudspeaker to determine one of an impedance and an admittance of the loudspeaker across a predetermined audio frequency range, to determine a plurality of adaptable parameters of the adaptive digital model of the loudspeaker, determining a fundamental resonance frequency of the loudspeaker from one or more of the adaptable parameters of the adaptive digital model of the loudspeaker, comparing the determined fundamental resonance frequency of the loudspeaker with a nominal fundamental resonance frequency of the loudspeaker representing a sealed state of the enclosure, detecting an acoustic leakage of the enclosure based on a deviation between the determined fundamental resonance frequency and the nominal fundamental resonance frequency of the electrodynamic loudspeaker.