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:
Jan. 15, 2013
Filed:
Sep. 30, 2010
Robert J. Fretz, Maplewood, MN (US);
Robert J. Fretz, Maplewood, MN (US);
IntriCon Corporation, Arden Hills, MN (US);
Abstract
A feedback transition threshold algorithm assesses and responds to feedback transition events in a hearing aid. The feedback transition threshold algorithm considers short duration trouble indicators, with the preferred primary short duration trouble indicators being the correlation witnessed between the incoming signal in a given frequency band and the same signal delayed by the estimated feedback loop time. If the short duration trouble indicators indicate that feedback squeal is likely and that the external feedback path is changing too quickly for accurate correction by the internal adaptive feedback reduction filter, when the signal level crosses the feedback transition threshold gain is reduced in that frequency band.