CPC H04R 3/02 (2013.01) [G10L 21/0232 (2013.01); G10L 2021/02082 (2013.01); G10L 2021/02163 (2013.01)] | 18 Claims |
1. An audio system comprising:
a speaker;
a microphone that generates a microphone signal based on sound output from the speaker;
a mixer module configured to generate a mixed signal by mixing the microphone signal with an audio signal;
a filter module configured to filter the mixed signal to produce a filtered signal and to apply the filtered signal to the speaker; and
a detector module configured to determine a howling frequency in the microphone signal attributable to sound output from the speaker,
wherein the filter module is configured to decrease a magnitude of the mixed signal at the howling frequency, and
wherein the detector module is configured to determine the howling frequency based on a comparison of the filtered signal applied to the speaker at a first time and the microphone signal at a second time that is after the first time.
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