Quite a lot of people experience certain hearing problems. Partial or complete deafness can be either a congenital or an acquired phenomenon, therefore, from the development of this ailment (for example, as a result of an injury), alas, no one is immune.

Fortunately, modern technology is ready to come to the rescue of hearing impaired people and help them cope with discomfort in everyday life.. For this, there are special electro-acoustic devices called hearing aids..

The modern market is literally replete with various types of these devices.. Hearing aids are distinguished by:.

• the method of processing the audio signal;

• setting method;

• the way of fastening on the ear.

In addition, depending on the method of processing the incoming sound signal, digital and analog devices are distinguished for the hearing impaired.. Analog devices amplify all ambient sounds, are fairly easy to operate and very affordable.

The disadvantages of such devices include the fact that they amplify sounds not selectively. In many cases, this can be a source of serious discomfort, as ambient noises are heard as well as human speech..

With digital devices, such problems do not arise, since they are able to reduce the level of extraneous noise and better transmit speech sounds..

Depending on which of the above types the device belongs to, its setting can be carried out either by software methods or manually.

Depending on the method used for attaching the hearing impaired to the ear, there are:.

Behind-the-ear devices - hold directly to the auricle. The device is connected to the earmold in the ear canal by means of a special tube.

Devices of this type are distinguished by a democratic cost and are most popular with buyers and specialists..

In-the-ear hearing aids - inserted directly into the auricle. Usually made to order, in compliance with all the anatomical features of the ear of a particular patient. Only used in cases of minor hearing impairment. Differ in miniature dimensions.

There are also quite large devices that are usually carried in a pocket.. Most often they are used by elderly people..

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