An Analysis of Acoustic Feedback in Hearing Aids

UCLA SPAPL

House Ear Institute

Rod Speece
 Abeer Alwan
Marcio Siqueira
 Evangelos Petsalis
Hsiang-Feng Chi
Sigfrid Soli
Shawn Gao
Acoustic feedback can cause oscillations and instability which lead to a howling sound produced by the hearing aid. Even motion near the hearing aid can cause changes in the acoustic feedback path. The purpose of this analysis is to quantify the acoustic path transfer function (APTF) of in-the-ear (ITE) hearing aids under both static and dynamic conditions.

Since these measurements of acoustic feedback in hearing aids include the responses of the hearing aid microphone and receiver, the feedback path is referred to as the Acousto-Electric Path Transfer Function (AEPTF).

This research is funded in part by the NIH.

Drawing of the Acoustic Feedback Path of an ITE Hearing Aid

[AEPTF of an ITE Hearing Aid]

Measurements with A Hand Moving Near the Ear

Acoustic Feedback Cancelation in Hearing Aids

Project References

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