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How to wear hearing aids?
When you first use a hearing aid, you may feel that the sound is not realistic and clear enough. Because you are used to your original hearing condition, you will hear some unfamiliar sounds after using a hearing aid, so you cannot adapt to it for a while. The main way to solve the problem is to carry out necessary adaptive training. Don't wear it for a long time at the beginning, don't make the volume loud, and slowly adapt to it.
How to conduct adaptive training?
Hearing aid adaptation training is not complicated. The general principle is to insist on wearing and distribution adaptation: 1) In terms of daily wearing time, it should be from short to long; 2. In terms of volume adjustment, the benefits should be small first and then louder 3 ) From the perspective of communication environment, it is better to be quiet first and then noisy, first simple and then complex. Only by doing this step by step can you get through the adaptation period as soon as possible and maximize the role of the hearing aid.
Why do hearing aids produce whistling sounds?
If the contact area between the earplug and the ear canal is not tightly sealed, the amplified sound will leak out from the gap and return to the microphone to be amplified again, causing howling. This phenomenon is similar to the common howling sound that occurs when a microphone is close to a speaker. 1) The hand or an object is close to the hearing aid, because part of the sound is reflected on the palm or object and then transmitted back to the microphone for further amplification. (2) The hearing aid is not completely inserted into the ear canal or is not tightly sealed with the ear canal wall, and the amplified sound leaks and is transmitted back to the microphone. (3) There is a large amount of earwax in the ear, earwax embolism occurs, and the amplified sound is reflected into the earwax. The signal is then passed to the microphone, which will also generate feedback.
How to avoid howling?
1) Now adjust the volume adjustment knob of the hearing aid to the 1 position, then insert the earplugs into the ears as tightly as possible, and then adjust the volume to the clearest position. (2) If the earplugs cannot be plugged tightly, please try another more suitable earplug. Plug the ears tightly and do not leak air.

Hearing aid sound amplifier for the elderly loudspeaker earphones

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ASIV Ear Wax Removal Kit Hydro Powered Ear Cleaner Rechargeable Electric Ear Cleaning Kit for Adults and Kids, Safe and Effective Ear Wax Remover (9+1 Disposable Tips) 

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Department	Unisex
What's In The Box	Hearing aid1 button battery3 earplugs of different sizes*3
Model Number	JA0904ZTQX
Model Name	JA0904ZTQX