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GSI BLOG

How Reliable is Automated Audiometry?

Reading Time: 3 min
by Tony Lombardo, MS
21/09/21

Automated audiometry has a long history as a screening application in industrial testing, the military, and schools. While these simple automated air conduction screenings may work well for these specific settings, they are rarely, if ever, used in a clinical setting. AMTAS, GSI’s automated audiometry software solution, is designed to be used in clinics and private practices obtain basic diagnostic audiometric testing including masked air conduction, masked bone conduction and speech testing that includes SRT and WRS. To be an effective tool in a clinical setting audiologists must have confidence in the results and understand how to interpret them. In addition to the audiogram graph and speech results, AMTAS provides a table of patented Quality Indicators that will give an overall reliability along with a variety of key indicators that will offer insight on what was happening during testing.

Predicted Accuracy: Overall Quality - Good, Fair, Poor, based on the quality indicators.
Predicted Average Absolute Difference: Difference between automated and manual thresholds based on a study where five expert audiologists tested patients manually and compared the results to AMTAS evaluations. Based on research.
Masker Alerts: These indicate thresholds where masking may have been too high or low.
Time Per Trial: Measures the average time from stimulus to patient response.
False Alarm Rate: The number of times patient responded with no stimulus presented is divided by number of trials when no stimulus was presented. When there is a false alarm, AMTAS displays a message to alert the patient that he responded yes when there was not a tone presented.
Average Test-Retest Difference: Displays the average difference between 1 KHz test and retest in the right and left ears.
Quality Check Fail Rate: When threshold is established, AMTAS presents a stimulus that is 5 dB above threshold. The patient should hear this tone. QC fail indicated the number of times patient did not respond to stimulus above threshold divided by the number of measured thresholds. If this is high, it can indicate malingering or that the patient is not a good candidate for AMTAS.
Number of Air/Bone Gap > 35 dB: This is the number of air/bone gaps that exceed 35 dB.
Number of Air/Bone Gap < -10 dB: This is the number of air/bone gaps that are less than 10 dB.

These Quality Indictors, based on years of research, are what sets AMTAS apart, and makes it a trusted tool for the clinical setting.

For a deeper dive into the research that drives AMTAS, visit the AMTAS page, and download the teleaudiology guide and discussion with Bob Margolis to learn what AMTAS can do for you!