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What is The Hearing (audiometry) Test?

What is The Hearing (audiometry) Test?
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What is The Hearing (audiometry) Test? You have a hard time hearing the sounds around you, what is being told in crowded noisy environments, if you think you have hearing loss, you should have a hearing test without wasting time. Generally, as the age gets older, sensitivity to sounds decreases and sounds of a certain frequency become inaudible. First of all, you should see an ENT specialist, and if necessary, you should see an audiometer. The test determines how much sound you hear, and these tests are done by audiometers.

What is The Hearing (audiometry) Test?
What is The Hearing (audiometry) Test?

1How to Make a Hearing Test?

After the hearing test is decided by the Otolaryngologist , this test can measure the patient’s hearing loss in the ear and the degree of this loss.

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  • It is carried out in a soundproof room.
  • A person is disconnected from the headphone that disconnects from the outside.
  • Sounds are given between different frequencies and the patient’s responses are evaluated.
  • If the person hears any sound, he presses the button in front of him. The sound he hears can be low, very loud, deep or high.
  • Audiometry tests are very important in revealing hearing loss in the ear.

2What Are The Species of The Hearing Test?

There are 4 different types of hearing test. These; pure sound audiometry , speech audiometry , tympanometry and acoustic reflex tests.

3Pure Sound Audiometry

It is the most commonly used hearing test. In this test, the minimum hearing level of both ears at different frequencies is determined. In pure audio audiometry, the person is taken to the soundproof cabin and different sounds are played to the patient through a special headset. The person is asked to press the button as soon as he hears the sound. With the help of the button, you can have an idea about whether the patient hears these sounds or how much they hear. The sound level heard is determined by this test. The hearing level of the airway and bone path is also determined in this measurement. The main purpose of airway measurements is to find the level of hearing threshold. It measures the degree of hearing loss. The bone path gives information from the inner ear. In this measurement; sensorineural  sensitivity of the defined of the person. Sensorineural sensitivity or sensorineural hearing loss can be defined as difficulty in understanding speech even if the volume of speech is high enough. Finally, extra attention should be give to some situations when performing pure audio audiometry. These situations are as follows;

 

  • If the patient has a complaint of tinnitus, he / she should report this to the audiometer and request that the voice be sent in a special tone to patients with a ringing complaint called warble.
  • Patients should press the button not only at the highest volume they hear, but also at the lowest volume.
  • If the bone conduction sound transducer is attached, it should be immobilized as much as possible.

 

4Speech Audiometry

This test, which is generally applied in many centers as an answer to the question of how to make a hearing test, is based on human voice. As a stimulus, evaluation of the condition of this sound in the ear, giving information about the person’s ear functions is the main task of speech audiometry. The thresholds set for this test are speech-taking threshold, speech-distinguishing threshold, comfortable listening threshold and disturbing level.

Speech Reception Threshold , also known as SRT, is sound intensity based on the ability of the patient to hear the words he can hears by 50%. In this hearing test, words are spoken to the person and these words are expected to be repeated. A limit is determined by looking at how many of the words the person is told to repeat. It is a very important test. Based on the pure sound average, 6 words consisting of 3 syllables over 10dB-15dB are given. It is continued according to the correct number of the patient and the volume is gradually decreased. When the patient has 2 right words on 6 words, the loudness given in the previous stage gives the result of the patient’s speech threshold.

Speech discrimination score , also known as SDS, is based on adding the patient 25dB – 40dB and repeating the list of 25 single syllables on the verge of getting the speech. Correct answers are multiplied by 4% and determine the level of distinguishing speech. This rate is around 90% for people who do not have any hearing problems.

Önerilen Yazı

Conductive Hearing Loss


The comfortable listening threshold
, also known as MCL (Most Comfortable Level), is the remaining listening level between the speech threshold and the disturbing sound level.

Disturbing level, also known as UCL (Uncomfortable Level), is the name given to the point where the patient is disturbed by the intensity of the sound level. In hearing loss due to conduction type, patients have high SRT and UCL scores. According to the speech audiometry test, SRT value should be 20dB, MCL value 40-60 dB, SDS value 90-100%, UCL value 100-120 dB in people who do not have any hearing problems.

5Tympanometry

Tympanometry, which is applied in the hearing test, helps to measure the person’s middle ear pressure. It is a fairly simple test. Pressure is applied to the outer ear canal . In this way, information about mobility in the middle ear and eardrum is obtained. Tympanometry is a test that can also be applied to infants. However, it cannot be applied in cases where the eardrum has holes. It provides information about the accumulation of fluid in the ear.

Acoustic Reflex Measurement

Acoustic reflex is the movement of the strapes muscle located in the middle ear after perceived sound. Its measurement is done by tympanometry. It gives information about the ways of hearing up to the level of the brain stem. The reflex received with high intensity sound is measured in the ear. The location of the condition that causes hearing loss is determined by acoustic reflex measurement.

Acoustic Reflex Measurement

 Acoustic reflex   is the movement of the  strapes muscle   located in the middle ear after perceived sound. Its measurement is done by tympanometry. It gives information about the ways of hearing up to the level of the brain stem. The reflex received with high intensity sound is measured in the ear. The location of the condition that causes hearing loss is determined by acoustic reflex measurement.

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