Hearing aid with enhanced high frequency reproduction and...

Details Hearing aid with enhanced high frequency reproduction and... Hearing aid with enhanced high frequency reproduction and...

2007-12-19

2011-10-04

Le, Huyen D (Department: 2614)

Electrical audio signal processing systems and devices

Hearing aids, electrical

Frequency transposition

C381S312000, C381S320000

Reexamination Certificate

active

08031892

ABSTRACT:
A hearing aid (50) comprises means (55, 56, 57, 58) for reproducing frequencies above the upper frequency limit of a hearing impaired user. The hearing aid (50) according to the invention comprises means (55, 57) for transposing higher bands of frequencies from outside the upper frequency limit of a hearing impaired user down in frequency based on a detected frequency in order to coincide with a lower band of frequencies within the frequency range perceivable by the hearing impaired user. The transposing means (55, 57) comprise an adaptive notch filter (15) for detecting a dominant frequency in the lower band of frequencies, adaptation means (16) controlled by the adaptive notch filter (15), an oscillator (3) controlled by the adaptation means (16), and a multiplier (4) for performing the actual frequency transposition of the signal. The invention further provides a method for processing a signal in a hearing aid.

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Japanese OA 2008-517317 Jan. 24, 2011 with English Translation.

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