The Work Of An Audiometer And Techniques In Audiometry

The Work Of An Audiometer And Techniques In Audiometry

by Marissa Velazquez

An audiometer is a special instrument used to identify and monitor hear loss and hearing disorders. It has standard calibrations which help to obtain the best results of the condition. Audiometric tests are carried out in a quiet soundproof room. Headphones are provided to the patient to place on his ears. The professional requests you to sit and remain calm.

Sound relayed from the machine to the patient is done at different frequencies and intensities. The patient is required to respond whenever he hears the sound by either raising his hand or pressing a button. The hand raised has to correspond with the side of the ear that has heard the sound. This is repeated until the sound is very faint. The reading is then examined for any abnormality then recorded on an audiogram.

There are many conditions that can cause a person to lose his ability to hear. Acoustic neuroma is one of such conditions. This is a slow growing tumor on the cranial nerve which is responsible for hearing and balance. Apart from hear loss it also causes facial paralysis.

Damage to the eardrum also known as the ossicle is also associated with hearing loss. Malfunction of a part of the hearing system known as vestibulocochlear nerve has been associated with sensorineural hearing loss. You might occasional experience a buzzing sound known as tinnitus. Mismanagement of some conditions like Vertigo can also result in hearing loss.

There are a number of tests than can be done to check for hearing ability. This are carried out according to the type of patient and the reason the test is to be done. The type of patient can be a newborn baby, young children or even adults. Children are not able to say when they have hearing problems. The audiologist has to use special equipments to test them. The principle followed in testing children is the same but the way of doing it may vary to be able to obtain more accurate results.

To test babies, the audiologist uses an otoacoustic emission test. This test is fast, simple and the child does not feel any pain. A tiny earpiece which contains a microphone and a small loudspeaker is securely placed in the ear. The loudspeaker produces clicking sound inside the ear which is passed to the cochlea. A well functioning cochlea responds by resending the sound to the ear canal which is heard by the microphone.

If no sound is heard, other factors have to be considered before a conclusion is reached. A noisy child would make it hard for the audiologist to pick the sound. A confirmatory test would be necessary to be sure. A more sensitive test called automated auditory brainstem response can be used to confirm the findings.

Young children are tested using a technique called reinforcement audiometry. Speakers are used to relay the sounds in the testing room and the child responds by turning towards the sound outlet. Every time this is done, the audiologist has to reward the child to keep him motivated. The frequencies are changed at different levels to see if the child can hear even at the lowest sound. Testing much older children and adults is done by use of pure tone audiometry technique. An <A href="http://www.henanmedical.com">audiometer</A> is used to transmit sounds through headphones at different pitches and levels.



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