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:
Feb. 25, 2003
Filed:
Jun. 28, 2001
Aleksey S. Khenkin, Peterborough, NH (US);
David E. Blackmer, Wilton, NH (US);
Earthworks, Inc., Milford, NH (US);
Abstract
This invention relates to a system and method for reducing non-linear electrical distortion in an electroacoustic device. Specifically, the present invention relates to a system and method for reducing spatially dependent electrical distortion, for example, distortion caused by differences in electrical displacement between a conductive membrane and a counter electrode at different parts of the conductive membrane. The system and method for reducing non-linear electrical distortion has particular application in condenser microphones comprising, for example, a conductive diaphragm receptive to sound, and a backplate electrically coupled thereto to generate an electrical output. In one exemplary embodiment, the present invention provides an electroacoustic system comprising a conductive membrane and a counter electrode electrically coupled to the conductive membrane. A face of the counter electrode facing the conductive membrane is curved. The curve is selected to reduce spatially dependant variations in electrical displacement between the counter electrode and the conductive membrane.