US 11,956,591 B2
Acoustic output device
Junjiang Fu, Shenzhen (CN); Lei Zhang, Shenzhen (CN); Xin Qi, Shenzhen (CN); and Fengyun Liao, Shenzhen (CN)
Assigned to SHENZHEN SHOKZ CO., LTD., Shenzhen (CN)
Filed by SHENZHEN SHOKZ CO., LTD., Guangdong (CN)
Filed on Feb. 24, 2022, as Appl. No. 17/652,483.
Application 17/652,483 is a continuation of application No. PCT/CN2020/116319, filed on Sep. 18, 2020.
Claims priority of application No. 201910888067.6 (CN), filed on Sep. 19, 2019; and application No. 201910888762.2 (CN), filed on Sep. 19, 2019.
Prior Publication US 2022/0182754 A1, Jun. 9, 2022
Int. Cl. H04R 1/40 (2006.01); H04R 1/02 (2006.01); H04R 1/10 (2006.01); H04R 1/22 (2006.01); H04R 1/24 (2006.01); H04R 1/28 (2006.01); H04R 1/34 (2006.01); H04R 7/04 (2006.01); H04R 7/18 (2006.01); H04R 9/02 (2006.01); H04R 9/06 (2006.01)
CPC H04R 1/40 (2013.01) [H04R 1/023 (2013.01); H04R 1/1008 (2013.01); H04R 1/1075 (2013.01); H04R 1/1091 (2013.01); H04R 1/227 (2013.01); H04R 1/24 (2013.01); H04R 1/2846 (2013.01); H04R 1/2884 (2013.01); H04R 1/345 (2013.01); H04R 7/04 (2013.01); H04R 7/18 (2013.01); H04R 9/025 (2013.01); H04R 9/06 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An acoustic output device, comprising:
a first acoustic driver including a first diaphragm;
a second acoustic driver including a second diaphragm;
a control circuit electrically connected with the first acoustic driver and the second acoustic driver respectively, wherein
the control circuit provides a first electrical signal for driving a vibration of the first diaphragm, and a second electrical signal for driving a vibration of the second diaphragm, and a phase of the first electrical signal and a phase of the second electrical signal are opposite;
a housing supporting the first acoustic driver and the second acoustic driver, wherein
a sound generated by the vibration of the first diaphragm is radiated outward through a first sound guide hole on the housing, and a sound generated by the vibration of the second diaphragm is radiated outward through a second sound guide hole on the housing; and
a third acoustic driver including a third diaphragm, wherein
the control circuit provides a third electrical signal for driving a vibration of the third diaphragm to generate a low-frequency sound, and
the low-frequency sound is radiated outward through a third sound guide hole and a fourth sound guide hole on the housing,
wherein a sound path difference between a sound emitted from the third sound guide hole to an ear of a user and a sound emitted from the fourth sound guide hole to the ear of the user is greater than a sound path difference between a sound emitted from the first sound guide hole to the ear of the user and a sound emitted from the second sound guide hole to the ear of the user.