Wearing hearing aids for deafness is like wearing glasses for myopia.
Hearing aids have no way to play a leading effect, it can only play an auxiliary role. For example, you can improve your vision by wearing glasses, but this improvement is temporary, you can see clearly when you wear glasses, but after taking off your glasses, your vision is still the same. The function of hearing aids and glasses is actually very close, when you can't hear, wearing hearing aids can help you hear clearly, can help you better communicate with people, but when the hearing aids are taken off, you still can't hear, so this hearing aid is just an auxiliary device, it does not have any ** effect.
As for when you need to wear a hearing aid, you should have some mild decline in deafness depending on your own hearing, which does not need to be improved by wearing a hearing aid, and may require someone to speak a little slower, a little louder, and you sound completely fine. However, if the degree of hearing loss is already obvious, moderate or above, or although the degree of decline itself is not too serious, it has affected your communication with others, or affected your life and work, you must wear hearing aids at this time.