CPC G10K 11/17854 (2018.01) [G10K 11/17815 (2018.01); G10K 11/17881 (2018.01); G10K 2210/3045 (2013.01)] | 9 Claims |
8. An active noise reduction method, comprising:
acquiring a plurality of noise signals output from a plurality of noise microphones;
selecting a plurality of reference signals and an error signal from among the plurality of noise signals, the plurality of reference signals corresponding to a noise, the error signal corresponding to an error between the noise and a canceling sound;
generating a control signal of the canceling sound from the plurality of reference signals by using a plurality of control filters; and
adaptively updating the plurality of control filters by using a plurality of acoustic transmission filters including:
at least one adaptive update filter configured to be adaptively updated; and
at least one non-adaptive update filter configured to be updated based on an update value of the adaptive update filter.
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