Onset of feedback howl in hearing aids

Authors

  • Michael R. Stinson National Research Council, Ottawa, Ont. K1A 0R6, Canada
  • Gilles A. Daigle National Research Council, Ottawa, Ont. K1A 0R6, Canada

Keywords:

Acoustic noise, Amplification, Electric potential, Feedback, Frequencies, Microphones, Oscillations, Signal processing, Telephone sets, Transfer functions, Acoustic feedback howl, Electrical signals, Feedback paths, Open-loop transfer functions

Abstract

The role of acoustical feedback howl in hearing aids is discussed. The Nyquist criterion asserted that the onset of feedback howl occurs when the overall feedback gain is unity. It is observed that the size of the feedback signal depends on the amplification settings of the hearing aid. It is stated that upon meeting the conditions for feedback howl, the howl will be evident at the ear canal microphone.

Downloads

Published

2004-09-01

How to Cite

1.
Stinson MR, Daigle GA. Onset of feedback howl in hearing aids. Canadian Acoustics [Internet]. 2004 Sep. 1 [cited 2021 Jul. 25];32(3):66-7. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1630

Issue

Section

Proceedings of the Acoustics Week in Canada