If the hearing begins to disappear, then often the only way to return it is to visit a specialized clinic and purchase a hearing aid. And his choice depends on the cause of loss of hearing and a number of recommendations of the attending physician.

Handling is recommended only in the best clinics. For example, in Kind Internal Service. You can find out about their offers at http: // www. Kind. Kiev. Ua /, there are also contact details. Here you not only can return the lost hearing, but also outline the possibilities of prevention. It is much better not to let such a problem arise, but not to fight the neglected case.

However, if you still had to purchase a hearing aid, then you need to learn to understand them. And the first division into species takes place according to the mode of wearing. Here distinguish:.

In-the-ear (completely placed in the ear canal, made to order, which makes it almost invisible. Can be located directly opposite the tympanic membrane);.

BTE (fixed behind the ear, and in the ear a special insert is inserted, connected with a special tube to the main apparatus. The most powerful gain and a number of additional functions);.

Spectacular (the main device is mounted in the arch of the glasses, the bone transmission of the sound signal is provided with the help of a vibrator on the inside of the arch);.

Pocket (have a large housing with a microphone, power supply and amplifier The insert is placed in the ear and connected by a wire to the main device. Has the highest possible power).

The second division passes by the method of signal transmission. And here there are only two options - bone or air conduction. The former are used in the event that a conducive hearing loss is diagnosed. And the sound signal is converted by the apparatus into vibration, which the human inner ear recognizes.

Air conduction is characteristic for prosthetics of any other cases. Here the sound is transmitted first to the insert placed in the ear, and then goes further.

If we talk about how to process the signal, then there are only two options:.

Analog;.

Numeral.

In the first case, the device is assembled from different parts (the three basic ones are always a microphone, amplifier, telephone). First, the sound signals are converted into electrical signals, amplified, and then converted back to sound. In the second case, there is an additional conversion of the signal to digital, which is processed by a computer chip.

That's all there is to know about the classification of hearing aids.

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