Patent ID: 9414161
Filing Date: 2016-08-09
CPC Classification: H04R

Claim Text:
1. A device comprising: a processor, a loudspeaker comprising a voice coil, one or more devices configured to determine loudspeaker voltage and loudspeaker current; a volume device configured to set a volume of the loudspeaker; and a memory storing a Bl product for the loudspeaker, the processor configured to: determine a Fourier space excursion-from-voltage transfer function H determine an acoustic response of the loudspeaker, as a function of frequency, below a dovetail frequency, and relative to a respective acoustic response at the dovetail frequency, using at least a second time derivative of the Fourier space excursion-from-voltage transfer function H determine an equalization as a function of frequency using the acoustic response, the equalization comprising gains that, when applied to the acoustic response, will adjust the acoustic response to the respective acoustic response at the respective acoustic response at the dovetail frequency; determine filter coefficients of a filter that corresponds to the equalization; and, apply the filter to an input signal for the loudspeaker.