What is the relationship between hearing aid sound feedback and howling?
Acoustic feedback is actually a howling. After the loop between the hearing aid receiver and the microphone forms a loop, the whistle (acoustic feedback) is generated. Hearing aids whistle, the term is called acoustic feedback. In general, the causes of hearing aid whistling can be summarized into two categories: one is internal hearing aid whistling, and the other is external hearing aid whistling.
The internal hearing aid whistling is a hearing aid whistling due to a problem inside the machine. It is customarily called internal acoustic feedback. The space inside the hearing aid is too small, causing the components of the machine to be squeezed together, resulting in howling. Hearing aids with internal acoustic feedback are usually turned on for repair; second: problems occur in the arrangement of components or circuits inside the hearing aid; third: due to vibration, the components inside the hearing aid are misaligned or displaced, causing howling; Four: The receiver and the sound tube are not well connected, and the water vapor enters the inside of the hearing aid, which causes the hearing aid to whistle inside. The so-called external hearing aid howling refers to the howling caused by the internal factors of non-hearing aids. If the contact area between the hearing aid and the ear canal is not well combined and the sealing density is insufficient, it is easy to leak the amplified sound, reflect it in the external auditory canal, and then re-amplify the sound again through the microphone and the amplifier, so that the cycle is reached. The limit value of the sound output of the hearing aid, and finally the external hearing aid whistle
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