US 12,035,103 B2
Speaker apparatus
Kunmao Sun, Dongguan (CN); and Yumin Zhang, Shenzhen (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Oct. 28, 2021, as Appl. No. 17/512,816.
Application 17/512,816 is a continuation of application No. PCT/CN2019/124904, filed on Dec. 12, 2019.
Claims priority of application No. 201920606974.2 (CN), filed on Apr. 29, 2019.
Prior Publication US 2022/0053264 A1, Feb. 17, 2022
Int. Cl. H04R 9/02 (2006.01); H04R 1/34 (2006.01)
CPC H04R 1/345 (2013.01) [H04R 9/02 (2013.01); H04R 2201/34 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A speaker apparatus, comprising:
a speaker sound emission unit having a speaker diaphragm, wherein the speaker sound emission unit is configured to convert an electrical signal into a sound signal by using the speaker diaphragm;
a horn having a sound inlet and a sound outlet, wherein the speaker sound emission unit is disposed on the sound inlet, and wherein the horn is configured to amplify the sound signal and then propagate an amplified sound signal through the sound outlet; and
a phase plug configured to adjust a phase and/or an amplitude of the sound signal from the sound inlet, wherein a distance between the speaker diaphragm and the phase plug is less than a wavelength of the sound signal, and relative locations of the speaker diaphragm and the phase plug remain unchanged to form an incompressible air cavity with a stiffness capacitive reactance, so that the sound signal can be propagated losslessly inside the incompressible air cavity formed between the speaker diaphragm and the phase plug.