It is caused by amplified sound from the hearing aid getting back to the micropphone and being re-amplified. Ways to avoid Whistling /noise Once the hearing aid is properly seated in your ear,the whistling will generally stop.
eBay
Why is there a whistling during the wearing process?. We give 3 different sizes of earplugs to reduce howling and noise. Suitable for mild to moderate severe hearing loss (Reference hearing loss map).
eBay
Hearing aid mode can be used by two; Bluetooth mode only supports monaural mode, two does not support pairing;. This product is single, need binaural hearing aid, buy two;. ▸ Music Mode: Hold 3s to connect devices (single-ear use only).
eBay
eBay
Features: -Specially designed for hearing-impaired people, more suitable for the ear canal. Even when used for a long time, there is no pain. -Your hearing aids can be charged using the detachable charging case (you will need to charge the charging case first). -Maximum gain is 117dB, suitable for moderate to severe hearing loss (see hearing loss table). -If the earmuffs are not fully inserted into the ear canal, or if the air leaks out of the earmuffs, it will cause an annoying whistling sound. We offer 3 different sizes of ear tips to reduce whistling and noise. -Super-mini size and light weight for easy carrying. Specification: .
eBay
2 x Hearing Aids. It takes about 2 hours to finish charging and you can use it for about 20 hours. 【EASY TO USE】-Blue device for left ear, red device for right ear, white charging case. Obvious On/Off button for easy operation.
eBay
Participate in pleasant conversations with family, friends or co-workers with our hearing aids for adults. Put it in a small box, which is easy to carry and go out. Double Noise Reduction Hearing aids.
eBay
►UK/US Tuned : Optimized for English speech frequencies (200-6,000Hz). 👂【Hearing Assistance & Bluetooth 2-in-1】. ✔️Stealth Design : Mini ABS housing (smaller than AirPods) – no "hearing aid stigma".
eBay