Hearing aids, hearing loss, communication with the social environment of a person with the continuation of comprehension of the language proposed and applied for the protection of medical products.

It is divided into analog and digital hearing aids hearing aids. Analog hearing aids , completely upgrading the outside noises; software-based digital hearing aids, they work and sound processes, and is addressed to the ear that allow you to listen to the person comfortable suzdurur. Today's digital hearing aids are quite a rapid development in technology and innovations with each passing day speech in addition to the benefits provided to be able to distinguish better with the user are equipped with appropriate technological features of modern life.

Hearing aids three main parts: a microphone, amplifier and speaker. The microphone(s) receives and transmits it to the amplifier sounds in the external environment. The amplifier (and processor) is in the process of upgrading islemlenip of these sounds. Finally, the amplified sound is transmitted to the ear through the speaker. Various materials are used during sound transmission, these are: ear molds, hose and horns, tubes, and may be DOMS. They use hearing devices hearing aid batteries as a power source.