How It Works the Auditory System?

People with hearing problems do not need to suffer the most. The technology has advanced and the use of a hearing aid can be the solution.

The Hearing Aid

If you have hearing problems, do not need to suffer the most. With the advancement of technology, came the hearing aids, that amplify sound and are tailor-made.

The use of a hearing aid is indicated by the doctor, who began to listen to less than that to which he was accustomed.

This can happen due to factors like aging, exposure to very loud noises for prolonged periods of time, or as a consequence of a disease.

There are some situations in which the device will not work anymore, in particular when the individual no longer has hearing or to have lost almost completely.



The that the hearing aid does is increase the volume of external sounds.

It is composed by:

  • A microphonethat captures the sound;
  • An amplifierthat amplifies;
  • A receiver, responsible for sending the amplified sound to the ear of the patient.
  • In the most up to date apparatus, it is possible to adjust the volume in different frequencies, which allows you to modulate the sound and makes the use of the device more comfortable.

The unit operates in the battery, which provide energy to the entire structure of the work, and that must be exchanged from time to time.


The models vary in size and type of each amplification. The most common are the retroauriculares and the intracanais.

The models fully into the channel this fit completely inside the ear canal and are indicated for hearing loss mild and moderate.

Are practically invisible when placed.

The models in the ear canal are placed in the ear canal, are comfortable and easy to use.

Are a little larger than the models entirely within the channel, allow the use of a long battery life, and integrate directional microphones for better understanding in noisy environments.

The models inside the ear are placed in the ear and in the ear canal.

Are a little larger than the models in the ear canal, but allow you to add other resources, such as microphones, buttons, control, directional and volume to enable different programs to best fit in any environment.

The model behind the ear has been conceived and designed to be discreet and be hidden in the ear. Have a tube of ultra-thin which leads the sound inside the ear. The tube is connected to a tip very soft fit in the ear canal, without the clog.

That which varies, essentially, between these models, is the portion of the ear where they are placed, the size and the mould. Each template is indicated for a type of hearing loss.


These devices have a series of functions, in addition to the essential: to increase the volume of the sounds. One of them is the on/ off function.

In general, they remain tied during the day and off when the patient goes to sleep.

The most up to date apparatus have even more functions, such as memory settings, to be used in environments that are more noisy or restless, for example.


The sound sent by the device is received by the cochlea, which is located in the inner ear. After it is transmitted to the acoustic nerve of the brain.


There are few models on the market withstand the water. Typically, these devices may not be used on the beach, swimming pool, in the shower, or during physical exercises that produce a lot of sweat.

It is necessary to have also careful of sports that can create an impact on the unit, so that this does not damage.