CPC H04R 3/02 (2013.01) [H04R 1/025 (2013.01)] | 17 Claims |
1. An audio system comprising:
a reference microphone configured to receive a reference audio signal;
a speaker configured to emit sound based on a speaker signal;
an error microphone configured to receive the sound emitted by the speaker and generate an error signal;
an audio controller configured to:
generate, based on the reference audio signal received by the reference microphone, a reference signal;
reduce feedback in the speaker signal provided to the speaker by feedforward processing the reference signal;
mitigate entrainment in the speaker signal by processing the error signal and the speaker signal in a frequency domain using state space filtering, wherein processing the error signal and the speaker signal comprises separating the error signal and the speaker signal into a plurality of frequency bands;
update the error signal by subtracting, based on the state space filtering, a feedback cancelation signal generated by the audio controller from an updated reference signal outputted by the reference microphone; and
generate an updated speaker signal by feedforward processing the updated error signal.
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