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Onset of feedback howl in hearing aids

Authors
Publisher
Canadian Acoustical Association / Association canadienne d'acoustique
Publication Date
Keywords
  • Hearing Aids
  • 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
Disciplines
  • Musicology
  • Physics

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.

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