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. 18, 1984
Filed:
Sep. 30, 1982
Applicant:
Inventors:
Carl R Anderson, Wilmette, IL (US);
William R Bevan, Evanston, IL (US);
Robert B Schulein, Evanston, IL (US);
Alan D Smith, Lubbock, TX (US);
Assignee:
Shure Brothers, Inc., Evanston, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ; H04M / ;
U.S. Cl.
CPC ...
381 81 ; 381 92 ; 381103 ; 381107 ; 381110 ; 381122 ; 1791 / ; 179 / ;
Abstract
A microphone channel is constructed from a pair of unidirectional microphone elements mounted back-to-back for monitoring sound coming from a predetermined area of space. The output signals of each microphone element are converted to D.C. logarithmic signals which are compared for gating an electrical output signal of a microphone element to the output/amplifying system.