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:
Feb. 01, 2022
Filed:
Jan. 02, 2019
Applicant:
Yamaha Corporation, Hamamatsu, JP;
Inventors:
Assignee:
YAMAHA CORPORATION, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/28 (2006.01); H04R 1/02 (2006.01);
U.S. Cl.
CPC ...
H04R 1/2819 (2013.01); H04R 1/02 (2013.01); H04R 1/025 (2013.01);
Abstract
An acoustic device includes an enclosure and a bass reflex port that includes a tube body. An inner wall surface of the tube body includes multiple regions in which viscous resistances in a tube axis direction of moving air and the inner wall surface are different. The multiple regions are provided along a circumferential direction of the inner wall surface. The tube body is attached to an opening area in the enclosure.