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:
Aug. 04, 1987
Filed:
May. 17, 1985
Alan R Watson, Buchanan, MI (US);
Michael A Bryson, Buchanan, MI (US);
Electrovoice, Inc., Buchanan, MI (US);
Abstract
A microphone having unique polar response characteristics has a virtual axis of maximum pickup sensitivity which is angularly displaced from its physical horizontal longitudinal axis. Forward and rearward movement of a diaphragm is sensed by a sensing element mounted in spaced relationship to a rear side of the diaphragm. A substantially enclosed cavity is formed between the diaphragm rear side and the sensing element, with a non-symmetrical arrangement of at least one aperture for permitting sound pressure waves to enter said cavity, so that the polar response curve of the microphone in a horizontal plane is angularly displaced about a line perpendicular to the microphone's horizontal longitudinal axis.