Process for controlling a programmable or program-controlled hearing aid for its in-situ fitting adjustment

  • US 5,991,417 A
  • Filed: 10/29/1997
  • Issued: 11/23/1999
  • Est. Priority Date: 05/02/1995
  • Status: Expired due to Term
First Claim
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1. A process for controlling a programmable or program controllable hearing aid (1) comprising a microphone (4) a controllable signal processor (6) for operating on one or more frequency bands, and a speaker (8) for in-situ fitting adjustment of said hearing aid to an optimum gain function in one or more frequency bands, by establishing the hearing threshold level (HTL) of the wearer for one or more frequency bands determining a target input/output response function for the detected hearing loss and generating a corresponding parameter set for an ideal input/output response function (13) for the detected hearing loss under feedback-free conditions, characterized byA setting the control parameter set of tile signal processor (6) initially to an input/output response function (13;

  • 19,

         20) with a maximum gain equal to the maximum gain (15) of the ideal input/output response function (13) having high gain at weak sounds and zero or low gain at powerful sounds andB operating the hearing aid in-situ in accordance with said initial input/output response function while monitoring said hearing aid for the occurrence of any acoustic feedback, andC if no noticeable feedback is detected setting said initial parameter set for said input/output response function into said hearing aid, andD if noticeable acoustic feedback is detected reducing the maximum gain (15, 15'"'"', 15") over at least one of said frequency bands while leaving unchanged with respect to said initial parameter set the gain in any other frequency band, to thereby obtain an adjusted input/output response for at least said one frequency band.

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