Abstract: Contingent negative variation audiometry (CNV-A) has been usedto determine the threshold of perception of an auditory stimulus(Prevec et al., 1973). The present study measured CNV on 17 volunteerswith 2000,4000Hz pure tone. The results show that the range ofthreshold difference between CNV-A and subjective tonal audiometry(ADG) was about - 10～10dB. The mean value of the absolute differenceof the results between CNV-A and ADG was 5.9±3.9dB but the meandifference between the results of both methods was only 3.3±6.3dB at2000Hz. At 4000Hz, the mean value of the absolute difference and meandifference between CNV-A and ADG was 5.0±2.9dB, 3.5±4.7dB respecti-vely. The results indicate that the improved CNV-A is useful forclinical purposes.

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