Pure Tone Audiometry (PTA) Test

Pure Tone Audiometry (PTA) Test is the key hearing test at Auris Hearing Care Professionals. This test is used to identify hearing threshold levels of an individual, enabling determination of the degree, type and configuration of a hearing loss.

PTA provides ear specific thresholds, and uses frequency specific pure tones to give place specific responses, so that the configuration of a hearing loss can be identified. As PTA uses both air and bone conduction audiometry, the type of loss can also be identified via the air-bone gap.

Purpose

To diagnose hearing problems that result from such conditions as acoustic trauma, sudden hearing loss, or deafness.


How it works

Your ability to hear tones at different volumes and pitches is measured when the sound is transmitted through bone and through air. A comparison between these two types of conduction can help determine which part of the hearing mechanism is responsible for the loss.

Preparation:
Your ears are checked to be sure wax is not blocking the ear canal. If so, facility is available at Auris Hearing Care Professionals for removal of the wax.


Test procedure

At Rehabilitaion Center, you enter a special soundproof metal room. You don headphones and are instructed to raise your hand when you hear a tone. Tones (steady or beeping) are played at six different pitches, representing the range of human hearing. Each time you raise your hand, the volume is dropped 10 decibels (dB) until you can no longer hear it. The test is repeated in the other ear.

You remove the headphones and put on a headband with a small plastic rectangle that fits behind your ear and conducts sound to your bone. The tones are repeated. If either ear tests poorly with earphones but normally with the bone-conduction piece, crossover (the good ear "helping out" the poor ear) is suspected.

The good ear will then be covered with a headphone, background masking noise played, and the test resumed. To test your ability to discern speech, you will put on the earphones again and listen to and repeat 25 common words.


After the test

You are free to leave and resume normal activities.


Advantages

It's quick, painless, and accurate.


Disadvantages

None.