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. 09, 2013
Filed:
Oct. 16, 2007
Tokurin Shou, Shibukawa, JP;
Tokurin Shou, Shibukawa, JP;
Japan Precision Instruments Inc., Shibukawa-shi, JP;
Abstract
The present invention provides a condenser microphone capable of detecting small sounds (e.g., Korotkoff sounds) with high sensitivity even in environments with variations in pressure, such as cuff pressure. A condenser microphone () is disposed as an acoustic sensor for detecting Korotkoff sounds in a communication space reachable by the internal pressure of the cuff of a blood pressure gauge. In the condenser microphone, a diaphragm () and a backplate) are disposed in the interior of a housing (), an aeration hole () is formed in a wall (B) that blocks off the housing back surface, and a sound-absorbing element () having sound absorption characteristics with respect to a frequency band targeted for detection is disposed on the front surface of a housing ().