Patent ID: 11875772
Assignee: AIROHA TECHNOLOGY CORP.
Field: Other consumer goods (Other fields)
Classification: CPC G | IPC G

Claim 9:
10. An adaptive active noise control (ANC) method comprising:
generating, by an ANC circuit, an anti-noise signal, wherein the ANC circuit comprises at least one adaptive filter;
receiving a first input signal derived from a reference signal that is generated by picking up ambient noise;
receiving a second input signal derived from an error signal that is generated by picking up remnant noise resulting from noise reduction, comprising:
applying a filtering operation upon the anti-noise signal output from the at least one adaptive filter to generate a filtered anti-noise signal; and
combining the filtered anti-noise signal and the error signal to obtain the second input signal; and

performing a comparison operation based on a first characteristic value of the first input signal and a second characteristic value of the second input signal to control the at least one adaptive filter.