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. 13, 1999
Filed:
Jan. 29, 1997
Isao Fushimi, Shizuoka, JP;
Star Micronics Co., Ltd., Shizuoka, JP;
Abstract
The invention provides an electroacoustic transducer wherein the resonant chamber is given a space and volume necessary for resonance and the vibration system is given an efficient air damping effect and thereby undesired vibrations are suppressed with the resonant effect maintained. The electroacoustic transducer according to the invention is provided with a resonant chamber for resonating with the vibration of a diaphragm and a sound ejecting hole for communicating the resonant chamber with the outside air formed on a position off to the central axis of the diaphragm. Furthermore, an air damping means for compensating the lowering of the air damping effect due to the dislocation of the sound ejecting hole from the central axis of the diaphragm is provided on the inner wall of the resonant chamber so as to surround the central axis of the diaphragm.