What's the matter with the sizzling noise in the receiver of hearing aid?

2020-06-11 What's the matter with the sizzling noise in the receiver of hearing aid?

There are two kinds of whistling of hearing aids: one is internal whistling when there is a problem inside the hearing. The internal whistling is caused by the small space, which causes the parts of the machine to be squeezed together. And it also whistle if the hearing aids fall. The other is external squealing if the ear mold is too small or sound tube breaks. There is also a problem of fitting. If the MPO is adjusted to the full scale, it will also generate a whistling.

Simply to say, if the capacity of a cup is 10ml of water, you add 15ml of water, then the water will overflow. The full scale gain of the hearing aid is also a problem. Only when the gain is excessive, can the acoustic feedback be generated to generate a whistling, so if the hearing aid emits sizzling noise , it's better to go to the hearing aid fitting center to see whether it's internal or external whistling, and then see whether it's the ear mold problem after the professional judges it.