US 12,245,011 B2
Active noise reduction acoustic unit and sound-producing unit
Shenggang Zhao, Welfang (CN)
Assigned to Goertek Inc., Shandong (CN)
Appl. No. 17/778,245
Filed by Goertek Inc., Shandong (CN)
PCT Filed Dec. 28, 2019, PCT No. PCT/CN2019/129566
§ 371(c)(1), (2) Date May 19, 2022,
PCT Pub. No. WO2021/098014, PCT Pub. Date May 27, 2021.
Claims priority of application No. 201911159350.1 (CN), filed on Nov. 22, 2019.
Prior Publication US 2023/0020424 A1, Jan. 19, 2023
Int. Cl. H04R 1/10 (2006.01); H04R 7/12 (2006.01)
CPC H04R 7/12 (2013.01) [H04R 1/1083 (2013.01); H04R 2207/021 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An active noise reduction acoustic unit, comprising:
a casing comprising a first casing and a second casing;
a baseplate arranged in the casing and separating the casing into a first accommodating cavity and a second accommodating cavity;
wherein the first accommodating cavity and the second accommodating cavity are communicatively coupled, the second casing comprises a metal material, the second casing and the baseplate enclose the second accommodating cavity, the second accommodating cavity including a feedback microphone configured to receive noise signals;
wherein the first casing and the baseplate enclose the first accommodating cavity, the first accommodating cavity includes an iron speaker adapted for vibration to produce sound according to the received noise signals, and a side portion of the first casing is provided with a sound outlet proximate to a vibrating diaphragm of the iron speaker; and
wherein the baseplate and the first casing are integrally formed, and the baseplate and the second casing are welded or bonded together.