We give 3 different sizes of earplugs to reduce howling and noise. The cause of howling/noise: In order to make a mini size hearing aid, the internal amplifier and the microphone are close to each other.
We give 3 different sizes of earplugs to reduce howling and noise. The cause of howling/noise: In order to make a mini size hearing aid, the internal amplifier and the microphone are close to each other.