Characteristics Of Hearing Aids

Hearing aids are also called body-worn or pocket hearing aids. They are rectangular boxes the size of a small radio, with microphones, amplifiers and batteries installed inside. A long wire connects the earphones and earplugs or special ear molds. They are usually placed in clothing pockets or special pouches. This type of hearing aid is large in size and suitable for the elderly and people with inconvenient finger movements. The distance between the microphone (microphone) and the receiver (earphone) of the hearing aid is far, and it is not easy to produce acoustic feedback, so the maximum output limit is small, the power can be made very large, and multiple manual adjustment knobs can be placed. It is inexpensive and easy to maintain. It uses No. 5 or No. 7 batteries, and rechargeable batteries can also be used. Body-worn hearing aids can also be made into binaural hearing aids. Because this type of hearing aid is large in size, it is not well concealed. Hearing aids use ordinary transistor components, with high background noise. In addition, the friction between the hearing aid itself and the wire and the clothes makes the sound easily distorted and the sound quality reduced. At the same time, the earphone wire is easily damaged, and it is not safe for children to wear.