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
Rechargeable USB Digital Hearing Aid Behind the Ear Sound Amplifier Elderly Noise Cancelling Deaf
Aliexpress UK
This Powertone F-138 In-Ear Hearing Aid is a quality hearing aid which can help you hear the sound clearly and loudly. - Silicone ear pads in 3 different sizes, suitable for any form of ear. - If you hear a howling,check the ear (silicagel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage.
eBay
Rechargeable USB Digital Hearing Aid Behind the Ear Sound Amplifier Elderly Noise Cancelling Deaf
Aliexpress UK
Oticon Engage Behind The Ear Bluetooth Hearing Aid.
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Rechargeable Hearing Aids Neckband Aids Hearing Amplifier Behind The Ear Sound Enhance Device Local
Aliexpress UK
Note: If you choose without bluetooth, the hearing aids just rechargable hearing aids, not bluetooth function! The cause of howling/noise: The internal amplifier and the microphone are close to each other of the hearing aid, and the sound is continuously received and expanded, so it has a certain possibility of produce howling after power-on.
eBay
2024 Behind The Ear Hearing Aids for elderly deafness rechargeable amplifier CIC mini digital
Aliexpress UK
The cause of howling/noise: The internal amplifier and the microphone are close to each other of the hearing aid, and the sound is continuously received and expanded, so it has a certain possibility of produce howling after power-on.
eBay
Hearing Aid Rechargeable Hearing Device ITE Ear Hearing Aids for The Elderly Audifonos Sound
Aliexpress UK
1x Voice Amplifier. Brown Ear Hook/Ear Plug With Battery. Ear Hook Size: 55 16 10mm. On power button, off power button, when not in use, make sure to set the switch to the off position to save energy;.
eBay
Hearing Aid Rechargeable Hearing Device ITE Ear Hearing Aids for The Elderly Audifonos Sound
Aliexpress UK
✔️ People with mild to moderate hearing loss. 🔊Crystal Clear Sound – Advanceddigital noise reduction technology filters background noise and enhances voices. 📦Portable & Lightweight – Small enough to carry anywhere – perfect for travel or daily use.
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hearing aid rechargeable RIC Hearing Aid for Middle-Aged And Elderly High Volume Behind-the-Ear
Aliexpress UK
Features: 1. TPE medical silicone, softer, with no harm to your skin after a long time wear; 2. Dual filtration function, auto filter the noise from the environment. Make the sound clearer and more nature; 3. Big Capacity Battery, Charge For 1 Hour, Use For 48 Hours; 4. Smart Chip, no need to match anything; 5. One power button, one volume control, easy to use. 6. FCC, ROHS, CE, EMC Certifications available. .
eBay
Hot selling RIC Hearing Aid for Middle-Aged And Elderly High Volume Behind-the-Ear Hearing Device
Aliexpress UK