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:
Jul. 03, 2018
Filed:
Dec. 15, 2016
Hiroshi Akino, Kanagawa, JP;
Hiroshi Akino, Kanagawa, JP;
KABUSHIKI KAISHA AUDIO TECHNICA, Tokyo, JP;
Abstract
A dynamic microphone that enables taking a long propagation path of a sound wave on a back side of a diaphragm, and by which unidirectivity can be obtained even at a low frequency. The dynamic microphone includes: a dynamic microphone unit; and an air chamber provided on a back side of a diaphragm of the dynamic microphone unit, wherein the air chamber is folded back to make a propagation path of a sound wave on the back side of the diaphragm long, a plurality of acoustic resistors is arranged in the air chamber at intervals to each other in a direction of the propagation path of a sound wave, and acoustic resistance values of the plurality of acoustic resistors become higher as the propagation path of a sound wave goes away from the diaphragm.