An Analysis of Acoustic Feedback in Hearing Aids
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
Measurements with A Hand Moving Near
the Ear
Acoustic Feedback Cancelation in Hearing Aids
Project References
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