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Hearing Tests

Test Overview

A hearing (audiometric) test is part of an ear exam that tests how well a person is able to hear. It is done by measuring how well sound can reach the brain.

The sounds we hear start as vibrations in the air around us. The vibrations make sound waves, which vibrate at a certain speed (frequency) and have a certain height (amplitude). The vibration speed of a sound wave determines how high or low a sound is (pitch). The height of the sound wave determines how loud the sound is (volume).

Hearing happens when these sound waves travel through the ear, Opens dialog and are turned into nerve impulses. These nerve impulses are sent to the brain, which "hears" them.

  • Sound waves, Opens dialog enter the ear through the ear canal (external ear). Then they strike the eardrum (tympanic membrane). The eardrum is what separates the ear canal from the middle ear.
  • The sound waves make the eardrum vibrate. The vibrations move to the bones of the middle ear. This boosts the sound and sends it to the inner ear.
  • The inner ear is a fluid-filled, curved space that is sometimes called the labyrinth. It contains the cochlea, the main sensory organ of hearing. Sound vibrations cause the fluid in the inner ear to move. This bends tiny hair cells (cilia) in the cochlea. The movement of the hair cells creates nerve impulses. These nerve impulses then travel along the cochlear nerve to the brain and are heard as sound.

Hearing tests help find what kind of hearing loss, Opens dialog you have. The tests measure how well you can hear sounds that reach the inner ear through the ear canal. They also measure sounds that are spread through the skull.

Most hearing tests ask you to respond to a series of tones or words. But there are some hearing tests that do not require a response.

Current as of: October 27, 2024

Author: Ignite Healthwise, LLC Staff

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