Patent ID: 9060217
Filing Date: 2015-06-16
Classification: H04R

Abstract:
1. A method for use in an audio system, the method comprising: (a) selecting a frequency in a frequency range; (b) selecting an amplitude from a plurality of amplitudes; (c) causing a signal generator to generate a signal at the frequency and the amplitude; (d) providing the signal to a loudspeaker to generate a sound; (e) generating a sound signal representing the sound using a microphone; (f) determining whether the sound signal has a distortion; (g) if the determining determines that the sound signal does not have the distortion and if a last amplitude of the plurality of amplitudes has not been reached, selecting another amplitude of the plurality of amplitudes and repeating steps (c)-(g) until the determining determines that the sound signal has the distortion; (h) recording, in response to determining that the sound signal has the distortion, the another amplitude causing the distortion as a minimum amplitude; and (i) filtering an audio signal utilizing the minimum amplitude.