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:
Nov. 17, 2009
Filed:
Mar. 30, 2005
Applicants:
Werner Lang, Vienna, AT;
Kurt Nell, Breitenfurt, AT;
Inventors:
Werner Lang, Vienna, AT;
Kurt Nell, Breitenfurt, AT;
Assignee:
AKG Acoustics GmbH, Vienna, AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A microphone includes a microphone capsule biased with a polarization voltage from a winding on a transformer. The polarization voltage is controlled by a regulation circuit that may have an analog regulation circuit and a digital regulation circuit. A controller adjusts the polarization voltage that varies the sensitivity of the microphone.