US 12,293,754 B2
Active noise control method and system for headphone
Qian Li, Shanghai (CN); Zhicong Wang, Shanghai (CN); and Xingqiang Wu, Shanghai (CN)
Assigned to BESTECHNIC (SHANGHAI) CO., LTD., Shanghai (CN)
Filed by Bestechnic (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Aug. 9, 2022, as Appl. No. 17/883,759.
Claims priority of application No. 202111101300.5 (CN), filed on Sep. 18, 2021; and application No. 202111305486.6 (CN), filed on Nov. 5, 2021.
Prior Publication US 2023/0087943 A1, Mar. 23, 2023
Int. Cl. H04R 1/10 (2006.01); G10K 11/178 (2006.01)
CPC G10K 11/17854 (2018.01) [G10K 11/17823 (2018.01); G10K 11/17825 (2018.01); G10K 11/17881 (2018.01); H04R 1/1083 (2013.01); G10K 2210/1081 (2013.01); G10K 2210/30231 (2013.01); G10K 2210/3026 (2013.01); G10K 2210/3027 (2013.01); G10K 2210/3028 (2013.01); G10K 2210/3056 (2013.01); H04R 2460/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An active noise control (ANC) method for a headphone, comprising:
determining whether a music signal is played by a speaker of the headphone; and
responsive to the music signal not being played by the speaker and a noise level of an ambient noise signal being greater than a noise threshold,
obtaining a set of noise feedforward (FF) signals based on a set of FF microphone signals acquired by a set of FF microphones of the headphone;
obtaining a noise feedback (FB) signal based on a first FB microphone signal acquired by a FB microphone of the headphone;
determining a set of leakage monitoring parameters based on the set of noise FF signals and the noise FB signal which are obtained when the music signal is not played by the speaker; and
adjusting a set of FF filter parameters for a set of FF filters to implement an ANC function in the headphone based on the set of leakage monitoring parameters,
wherein the set of FF filters is tuned sequentially, the set of leakage monitoring parameters is determined sequentially based on the sequential tuning of the set of FF filters, and the set of FF filter parameters for the set of FF filters is adjusted sequentially based on the sequential determination of the set of leakage monitoring parameters.