The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2021
Filed:
Dec. 19, 2017
Applicant:
Goertek Technology Co., Ltd., Qingdao, CN;
Inventors:
Assignee:
Goertek Tehnology Co., Ltd., Qingdao, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61F 11/14 (2006.01); H04R 3/02 (2006.01);
U.S. Cl.
CPC ...
A61F 11/14 (2013.01); H04R 3/02 (2013.01); A61F 2011/145 (2013.01);
Abstract
The present disclosure discloses a noise-reducing earmuff, comprising: an earmuff shell forming an earmuff cavity; a separator being installed in the earmuff cavity and forming an independent chamber; and a conduit being installed on the separator, the conduit being provided with an opening at each of the two ends thereof; wherein one of the openings being located in the chamber, and the other extending out of the chamber and being located in the earmuff cavity; wherein the chamber and the conduit form a low-frequency resonator whose resonance frequency is equivalent to a corner frequency of a low-pass filter formed by the earmuff.