Beattie R C, Moretti M, Warren V
J Speech Hear Disord. 1984 May;49(2):114-27. doi: 10.1044/jshd.4902.114.
Auditory evoked responses to tone pips were recorded on 10 normally hearing adults. Tone pips centered at 500 and 2000 Hz with 1, 2, and 4 ms rise-fall times were presented at intensities of 40, 30, 20, and 10 dB nHL. The band-pass of the recording-amplifier system was set to 55 and 3000 Hz. Responses were measured during the first 25 ms following the onset of the stimulus and the first three prominent waves were labeled P10, N15, and P20. The results indicated that varying rise-fall times from 1 to 4 ms had little effect on the detectability of these waves. Consequently, the 4-ms rise-fall time was recommended because of its greater frequency specificity. The number of identifiable responses was similar for both 500 and 2000 Hz for waves P10, N15, and P20. The similarity in the number of detectable responses suggests that any of these waves may be used as a threshold indicator. The acoustic/physiologic mechanisms underlying the latency changes are discussed.
对10名听力正常的成年人记录了对短音的听觉诱发电位。以500和2000赫兹为中心、上升-下降时间分别为1、2和4毫秒的短音，以40、30、20和10分贝听力级的强度呈现。记录放大器系统的带通设置为55至3000赫兹。在刺激开始后的前25毫秒内测量反应，并将最初三个明显的波标记为P10、N15和P20。结果表明，上升-下降时间从1毫秒到4毫秒的变化对这些波的可检测性影响很小。因此，由于其具有更高的频率特异性，推荐使用4毫秒的上升-下降时间。对于P10、N15和P20波，500赫兹和2000赫兹时可识别反应的数量相似。可检测反应数量的相似性表明，这些波中的任何一个都可以用作阈值指标。文中讨论了潜伏期变化背后的声学/生理机制。
