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KMID : 0361020110540010048
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Korean Journal of Otolaryngology - Head and Neck Surgery
2011 Volume.54 No. 1 p.48 ~ p.54
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Psychoacoustic Characteristics of Prepulse Gap in Tinnitus Patients: A Preliminary Study to Develop an Objective Test Detecting Tinnitus
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Suh Myung-Whan
Lee Hyun-Ju
Kim June-Sic
Park Il-Yong
Jung Jae-Yun
Oh Seung-Ha
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Abstract
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Background and Objectives : The objective of this study was to observe whether there are differences in detecting ability of pre-pulse gaps between tinnitus patients and normal subjects.
Subjects and Method : Ten tinnitus patients and eight normal subjects were recruited. Fifty stimuli composed of a background noise and a pulse noise were presented to the subjects. For certain stimuli, a short gap preceding the pulse noise was inserted but for others, no gaps were inserted. The two groups were subjected to a gap lasting 300 and 200 msec. The subjects were then asked if they detected the gap during the stimulus and the number of correct answers were counted.
Results: In the tinnitus patient group, the number of correct answers for gap-stimuli detection was significantly smaller when the gap was shortened to 200 msec. In the control group, however, there was only a slight difference in the score. When the length of the gap was shortened to 200 msec, the score significantly decreased in 50% of the tinnitus patients whereas the score increased in only 12% of the control group.
Conclusion: The ability to detect pre-pulse gaps is affected by tinnitus in humans just as in the animal models.
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KEYWORD
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Tinnitus, Prepulse gap, Psychoacoustic test
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