What type of distortion occurs when a single frequency is input into a hearing aid?

Harmonic distortion is the type of distortion that occurs when a single frequency is input into a hearing aid. This form of distortion arises when the output signal contains harmonics, which are integer multiples of the original frequency. Essentially, when a single frequency is amplified, it may produce additional frequencies that are related to the fundamental frequency, introducing unwanted sounds that can affect the clarity and quality of the audio output.

Harmonic distortion is particularly significant in audio applications, including hearing aids, because it can lead to a less natural and more distorted sound perception for the user. A hearing aid aims to provide clear sound reproduction, and understanding harmonic distortion helps dispensers recognize potential issues in device performance and optimize settings for the user’s needs.