When the receiver in the hearing aid outputs the amplified sound, part of the sound leaks through the air hole or the gap avoided by the ear canal (it can also leak through vibration through the mechanical structure of the hearing aid). After this part of the sound is picked up by the microphone of the hearing aid, it becomes a signal again It is cyclically amplified (secondary amplification), and then the energy of certain frequencies of the hearing aid resonates and emits an audible howling sound.A high-frequency sound described as “creaking” after being heard.
Fourth: The receiver is not well connected with the sound tube, and it is damp, and water vapor enters the hearing aid, which will cause the internal whistling of the hearing aid.
After a period of adaptation training, hearing aids will become more comfortable to wear, and you can go to a more chaotic environment. Hearing aids will help you receive all kinds of sounds that we should hear. At this time, you will feel that the sound is How wonderful, how wonderful it is to live in the world of sound.
Link： Hearing aids always make a harsh sound, what's the matter?
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