Oates P, Stapells D R
Doctoral Program in Speech and Hearing Sciences, Graduate Center, City University of New York, New York.
Ear Hear. 1992 Feb;13(1):28-34. doi: 10.1097/00003446-199202000-00007.
Auditory brain stem responses (ABRs) to 95, 80, 60, 40, and 30 dB nHL clicks were retrospectively studied from 103 patients (194 ears) with various degrees of cochlear impairment. Hearing loss and sample size were balanced across gender. Results indicate that the slope of the wave V latency versus 4000 Hz hearing loss function doubles as click intensity is decreased from 80 (0.01 msec/dB HL) to 60 nHL (0.02 msec/dB HL). Overall results indicate a slope increase of 0.0004 msec for each decibel decrease in click intensity from 95 to 30 dB nHL. Intersubject variability increased with increased hearing loss and/or decreased stimulus intensity. The effects of hearing loss on wave V latency are minimal, and intersubject variability is less if high-intensity clicks (greater than or equal to 95 dB nHL) are used. No differences in the effects of hearing loss on wave V latency were seen between males and females. Latency corrections for cochlear hearing loss should, therefore, consider stimulus intensity.
对103例（194耳）不同程度耳蜗损伤患者的听觉脑干反应（ABR）进行回顾性研究，刺激声为95、80、60、40和30 dB nHL的短声。听力损失和样本量在性别上保持均衡。结果表明，当短声强度从80 dB nHL（0.01毫秒/分贝听力损失）降至60 dB nHL（0.02毫秒/分贝听力损失）时，V波潜伏期与4000 Hz听力损失函数的斜率翻倍。总体结果表明，短声强度从95 dB nHL降至30 dB nHL，每降低1分贝，斜率增加0.0004毫秒。个体间变异性随听力损失增加和/或刺激强度降低而增大。听力损失对V波潜伏期的影响极小，使用高强度短声（大于或等于95 dB nHL）时个体间变异性较小。男性和女性在听力损失对V波潜伏期的影响上未见差异。因此，耳蜗性听力损失的潜伏期校正应考虑刺激强度。
