Why does the hearing aid have loud screeching sound How to wear a hearing aid
Because the contact part of the earplug and the ear canal is not completely closed, the sound amplified by the hearing aid leaks from the gap and is amplified again by the microphone, so there will be a howling sound.
How to wear a hearing aid
Step1: Ensure the hearing-aid is fully charged.
Step2: Turn off the hearing aid, switch to level 0 and choose the noise-canceling mode.
Step3: Place the device close to the outside of your ears, and put the earplugs into the ears in this way.
Step4: Make sure the earplugs can fill the ear canal.
Step5: Then turn on the hearing aid, turn up the volume little by little.
Step6: If the volume is within the acceptable range, we just need to spend some time getting used to the device.
"M" stands for the mode. Press the "m" button to enter the low-frequency mode and send out a beep, which will perform a simple noise reduction process for the ambient sound and is suitable for a quiet environment.
Press the "M" key again to send out two beeps and enter the intermediate frequency mode to bring the best sound quality and the most comfortable experience, which is suitable for listening to music.
After pressing the "M" key for the third or fourth time, three or four beeps will be emitted, which enhances the noise reduction effect and is suitable for noisy environment.