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AUDIOMETRY

DR. THAN TUN AUNG

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1. What is audiometer?2. What is an audiometric test ?

3. Why its important to you?

4. How to take an audiometric test?

a. Pre-test examination

b. Audiometric test

5. How to interpret an audiogram?

6. Benefits

LEARINIG OUTCOMES

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1. What is audiometer?

An electrical instrument for

measuring hearing activity for

pure tones of normally audible

frequencies.

It is also called sonometer.

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Earphones

Audiometer

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Clinical and Portable Audiometer

Audiometer

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Insert Earphone

Audiometer

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Bone Conduction Vibrator

Audiometer

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Computerized Audiometer

Audiometer

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Sound Treated Booth

Test Environment

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Circumaural Enclosures

Test Environment

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Quiet Room

Test Environment

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2. What is an Audiometric Test ?

A test fordetermining your hearing

sensitivity

Determines how well you can hear

A very useful tool in the hearing

conservation program Can identify when your hearing is being

compromised

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3. Why Its Important to You?

Audiometric testing identifies

Progressive noise-induced hearing losses

before they become an impairment

Temporary losses before they become

permanent, providing time for remedial steps

Without regular audiometric testing youmay not know your hearing is being

compromised until it is too late!

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Purposes of audiometric testing

Monitor the effectiveness of the hearing

conservation program

Identify significant threshold shift

Establish readiness and fitness for duty

Ensure proper referral and diagnosis

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4. How to take an audiometric test?

History taking: The examiner will ask

you questionsas part of the

evaluation

Ear, nose, & throat problems such ascolds, infections, and congestion?

Noisy hobbies or activities?

Time since exposure to loud noise?

Clinical examination: The examiner

may also visually check your outerear canal with an otoscope for

Ear infections

Excessive earwax

Obstructions in the ear canal

a. Pre-test examination

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You will sit in a quiet booth andbe equipped with a headsetand a signal switch

You will heartones of varying

level and frequency You will be instructed to

depress the signal switch toindicate a tone was heard

Be honest; dont try toanticipate or intentionally missa tone, or the test will beinvalid

b. Audiometric Test

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5. Interpretation of an audiogram

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What is audiogram?

The audiogram is a chart of hearing

sensitivity with frequency charted on the

X- axis and intensity on the Y-axis.

Intensity is the level of sound power

measured in decibels; loudness is theperceptual correlate of intensity.

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An audiogram

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An audiogram

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An audiogram

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An audiogram

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Severity of Hearing Loss

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Severity of hearing loss

Hearing Hearing Loss (dB) Level

Normal 0 to 25 Whisper

Mild loss 26 to 40 Quiet Speech

Moderate 41 to 55 Normal speech

Moderately Severe 56 to 70 Loud speech

Severe 71 to 90 Shouting

Profound 91+ Road drill

Impairment re: thresholds based on ANSI 1996

Values are based on an average level of hearing at 2, 3, & 4 kHz in

either ear.

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Normal Hearing

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Conductive Hearing Loss

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Sensorineural Hearing Loss

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Mixed Hearing Loss

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6. Benefits of Taking an

Audiometric Test

Preventing the adverse affects Tinnitus ringing in the ears

Temporary hearing loss Shouting to communicate with

others during and after work

Permanent hearing loss Isolation from loved ones and everyday life

Permanently handicapped, there is no cure

Not even hearing aids can restore the quality of life to thelevel of natural hearing

Is preventive action required? Use of proper hearing protection devices

Removal from high noise areas

Follow up exam with audiologist

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Taking an Audiometric Test

Miners hearing is precious and we need to work

together to preserve their quality of life

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