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Improved contingent negative variation audiometry | JoVE Visualize

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Improved contingent negative variation audiometry

T S Prevec, K Ribarić

Audiology : Official Organ of the International Society of Audiology|January 1, 1980

View abstract on PubMed

Summary

This study improved contingent negative variation audiometry (CNV-A) accuracy by increasing CNV amplitude using visual stimuli. The enhanced CNV-A method shows greater precision in objective auditory threshold measurement.

Area of Science:

Neuroscience
Audiology
Psychophysics

Background:

Contingent negative variation audiometry (CNV-A) is an objective method for assessing auditory thresholds.
The accuracy of CNV-A is primarily determined by the amplitude of the contingent negative variation (CNV).

Purpose of the Study:

To enhance the accuracy of CNV-A by increasing CNV amplitude.
To investigate the efficacy of a modified CNV-A paradigm utilizing visual stimuli to elicit a stronger CNV response.

Main Methods:

A modified CNV-A paradigm was employed, using a light stimulus (red or green) as the S2 stimulus.
Participants (n=12) were required to recognize and react to the S2 stimulus.
Simultaneous registration of CNV and slow vertex response was performed.

Main Results:

The modified method resulted in a higher average CNV amplitude compared to previous CNV-A techniques.
The mean absolute difference between the new CNV-A and subjective tonal audiometry (ADG) was 6.9 ± 5.5 dB.
The mean difference between the two methods was 4.3 ± 7.8 dB, indicating improved accuracy.

Conclusions:

The revised CNV-A method demonstrates increased accuracy in objective auditory threshold determination.
Further improvements may be achievable by considering psychological factors influencing CNV amplitude and employing advanced computer analysis.
The potential exists for even more precise objective measurement of auditory perception thresholds using CNV-A.

Computer Vision And Multimedia Computation

Audio Processing

Improved Contingent Negative Variation Audiometry