Indravati Hospital
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What is audiometry?
An audiometry exam tests your ability to hear sounds. Sounds vary, based on their loudness (intensity) and the speed of sound wave vibrations (tone). Hearing occurs when sound waves stimulate the nerves of the inner ear. The sound then travels along nerve pathways to the brain.
Types of Audiometry -
⦁ Speech audiometry - The objective of speech audiometry is to assess the integrity of the entire auditory system by evaluating hearing ability. Neural type of hearing loss can be identified with the help of speech audiometry. Speech audiometric test is further categorized into speech discrimination test and speech reception threshold test.
⦁ Immittance audiometry - Immittance audiometry is used to determine the presence of middle ear fluid.
⦁ Tympanometry - Tympanometry tests how well your eardrum moves. The audiologist will put a small probe, which looks like an earphone, into each ear. A small device attached to the probe will push air into your ear.
⦁ Pure-tone audiometry - Pure-tone audiometry is considered to be the gold standard in the evaluation of auditory sensitivity. The extent of hearing loss and the cause is determined using pure-tone audiometry. It helps in finding out the hearing thresholds at different frequencies.
⦁ Self-recording audiometry - Self-recording audiometry is also referred to as Bekesy audiometry. In 1947, George von Bekesy first introduced this test. In this procedure, intensity and frequency are automatically changed with the help of a motor.
⦁ Subjective audiometry - In this test, the subjects are asked to respond when they hear the presented sound. This audiometric test can present systematically varying acoustic stimuli to the subjects and record their responses.
⦁ Objective audiometry - Unlike subjective audiometry, this test is not dependent on responses from the patients. However, the subjects are asked to cooperate during the attachment of the measuring electrodes or probes for carrying out the objective test.
Procedure for Audiometry -
A probe is inserted into the ear and air is pumped through it to change the pressure within the ear as tones are produced. A microphone monitors how well sound is conducted within the ear under different pressures.
How to Prepare for Audiometry?
An audiometry exam requires no special preparation. All you have to do is show up to your appointment on time and follow the audiologist’s instructions.
Why Audiometry Is Performed?
An audiometry test is performed to determine how well you can hear. This may be done as part of a routine screening or in response to a noticeable loss of hearing.
The common causes of hearing loss include:
⦁ Birth defects
⦁ Chronic ear infections
⦁ Inherited conditions, such as otosclerosis, which occurs when an abnormal growth of bone B prevents structures within the ear from functioning properly
⦁ An injury to the ear
⦁ Inner ear diseases, such as Ménière’s disease or an autoimmune disease that affect the inner ear
⦁ Regular exposure to loud noises
⦁ A ruptured eardrum
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INDRAVATI HOSPITAL.
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