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:
Dec. 10, 2002
Filed:
Jun. 15, 2001
Alexander Paritsky, Modiin, IL;
Alexander Kots, Ashdod, IL;
Kazuo Takahashi, Tokyo, JP;
Okihiro Kobayashi, Tokyo, JP;
Phone-Or Ltd., Or-Yehuda, IL;
Abstract
A communication helmet having an enhanced noise reduction effect. The communication helmet incorporates a microphone disposed in the vicinity of the mouth of the speaker wearing the helmet. The microphone is an optical microphone comprising a diaphragm ( ) vibrating with sound pressure, a case ( ) containing the diaphragm ( ) and having a first opening ( ) and a second opening ( ) open in symmetric positions and facing the diaphragm ( ), a light source ( ) for projecting a light beam to the diaphragm ( ), and a photodetector ( ) receiving part of the reflected light of the light beam projected to the diaphragm ( ) and outputting a signal corresponding to the vibration of the diaphragm ( ). The optical microphone is fixed to a fixing base ( ) at a predetermined angle so that the incoming sound wave may uniformly enter the first opening ( ) and the second opening ( ). The fixing base ( ) is attached to the helmet with a space so that the external sound wave may uniformly enter the first opening ( ) and the second opening ( ).