US 12,262,167 B2
Open acoustic device
Chengqian Zhang, Shenzhen (CN); Jinbo Zheng, Shenzhen (CN); Le Xiao, Shenzhen (CN); Fengyun Liao, Shenzhen (CN); and Xin Qi, Shenzhen (CN)
Assigned to SHENZHEN SHOKZ CO., LTD., Shenzhen (CN)
Filed by SHENZHEN SHOKZ CO., LTD., Guangdong (CN)
Filed on May 16, 2023, as Appl. No. 18/318,673.
Application 18/318,673 is a continuation of application No. 18/049,620, filed on Oct. 25, 2022, granted, now 11,689,845.
Application 18/049,620 is a continuation of application No. PCT/CN2022/078037, filed on Feb. 25, 2022.
Claims priority of application No. 202111399590.6 (CN), filed on Nov. 19, 2021.
Prior Publication US 2023/0292036 A1, Sep. 14, 2023
Int. Cl. H04R 1/10 (2006.01); G10K 11/178 (2006.01)
CPC H04R 1/1083 (2013.01) [G10K 11/17857 (2018.01); G10K 2210/1081 (2013.01); H04R 2460/01 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An open acoustic device, comprising: a fixing structure configured to place the acoustic device near an ear of a user without blocking an ear canal of the user; a first microphone array configured to acquire environmental noise; a signal processor configured to: determine, based on the environmental noise, a primary route transfer function between the first microphone array and the ear canal of the user; generate, based on the environmental noise and the primary route transfer function, a noise reduction signal; and a speaker configured to output, according to the noise reduction signal, a noise reduction acoustic wave, the noise reduction acoustic wave being configured to eliminate noise signal at the ear canal of the user, wherein determining, based on the environmental noise, the primary route transfer function between the first microphone array and the ear canal of the user includes: estimating, based on the environmental noise, a direction of a noise source; and determining the primary route transfer function according to the environmental noise, the direction of the noise source, and position information of the first microphone array and the ear canal of the user, wherein the speaker includes two sound guiding holes, and the first microphone array is located near a mid-perpendicular line of a connecting line between the two sound guiding holes so that the microphones is in a region where a sound pressure level of the speaker is minimum.