2016年9月1日星期四

How Do Ears Work?

To understand what happens when hearing is lost, we must know first how the ear works. Put very simply, your ear is an organ that converts sound waves in the air into information in your brain and sometimes even emotions. And if there is a problem with your hearing, you should go for a doctor, or get yourself in ear hearing aids or axon hearing aid.

The ear can perceive sounds from barely audible to very loud sounds, as well as differentiate the volume and distance and identify the direction of a sound source very accurately.

It consists of three parts:

EXTERNAL EAR
It consists of the visible part of the ear, also called atrium, and the ear canal. Sound waves, airborne, are collected and guided through the ear canal to the eardrum, a flexible membrane and circular vibrates when waves hit it.

THE MIDDLE EAR
It is an air-filled space that is separated from the outer ear by the eardrum. In it we find three tiny bones, known as "bones", called the hammer, anvil and stirrup. These bones form a bridge from the eardrum to the inner ear, and vibrate in response to movements of the eardrum, amplify and conduct sound to the inner ear through the oval window.

INNER EAR
The inner ear, or cochlea, is shaped like a snail shell and contains many membranous sections filled with liquid. When the "bones" conduct sound to the oval window, the fluid moves and stimulates nerve cells in the ear into the cochlea. These hair cells in turn send electrical impulses through the auditory nerve to the brain where they are interpreted as sound.

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