Tips for buyers:
The cause of howling/noise:
To make a small size hearing aid, hearing aid the internal amplifier and the microphone are close to each other. The sound is continuously received and extended, so it has a certain possibility of producing howling after power-on.
Ways to avoid howling/noise:
1. When the power is high (the amplified sound is large), howling is more likely to occur. Therefore, gradually increasing the volume of layer can effectively prevent howling.
2. When the ear canal is completely closed, there is no howling sound. So, please use hearing aids after cleaning your ear canal, and test the ear tips from largest to smallest to find the most suitable ear tips.
3. After the hearing aid enters the ear canal, it is recommended to push the hearing aid with your fingers and hold it for 1-2 seconds, and then release it completely from the earplug.