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:
Oct. 21, 1997
Filed:
Oct. 17, 1996
Applicant:
Inventor:
Roy Skovgaard Hansen, Drag.o slashed.r, DK;
Assignee:
GN Danavox A/S, Taastrup, DK;
Primary Examiner:
Int. Cl.
CPC ...
H04R / ; H04B / ;
U.S. Cl.
CPC ...
381 682 ; 381 68 ; 381 71 ; 381 83 ; 381 73 ;
Abstract
A hearing aid with digital, electronic compensation for acoustic feedback includes a microphone, a preamplifier, a digital compensation circuit and output amplifier and a transducer. The digital compensation circuit includes a noise generator for the insertion of noise, and an adjustable, digital filter for the adaptation of the feedback signal. The adaptation takes place using a correlation circuit which includes a digital circuit to carry out a statistical evaluation of the filter coefficients in the correlation circuit, and changes the feedback function in accordance with this evaluation.