Programmable multichannel hearing aid with adaptive filter

Electrical audio signal processing systems and devices – Sound effects – Reverberators

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381 68, 381 682, H04R 2500

Patent

active

050833120

ABSTRACT:
A hearing aid is programmable with dual-tone multiple-frequency signals, received through the hearing aid microphone, to adjust operating coefficients of signal conditioning circuitry in the aid. A DTMF receiver filters and detects DTMF tone pairs into digital words provided to a controller for decoding, some of the digital words representing programming instructions and others representing data. In accordance with the instructions, the controller conveys the data to memory operatively associated with a plurality of control ports to the signal conditioning circuitry, with operating coefficients of the conditioning circuitry determined by the contents of the memory.

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