Mini In-Ear Aids Enhancer Sound Voice Amplifier Hearing Invisible Digital

Category

Hearing Aids

Store

eBay

Brand

Unbranded

The reason for the howling/noise: To make a mini hearing aid, the internal amplifier and microphone are very close together. The sound is constantly receiving and expanding, so there is a certain possibility of whistling after the power is switched on.

33.99 GBP