Klein A J
Arch Otolaryngol. 1983 Jan;109(1):6-12. doi: 10.1001/archotol.1983.00800150010002.
A slow-wave component of the brain-stem response recordable to signals at low sensation levels shows some promise for estimating hearing thresholds at low frequencies. This study describes several properties of this slow-wave response (SWR) in 30 normal hearing subjects and examines correlations with psychophysical thresholds. Acoustic signals were tone pips at 0.25, 0.5, 1, 2, and 4 kHz with 3-ms rise-fall times and no plateau. Repetition rate was 40/s. The EEG was filtered at 20 to 1,500 Hz before averaging. Results showed SWR thresholds were on the average about 15 dB higher than behavioral thresholds, however, the range was 0- to 35-dB sensation level. A large decrease in SWR amplitude and a 20-dB increase in threshold could occur in states of deep sleep. The SWR appears to be useful for estimating low-frequency thresholds, but the 35-dB threshold range in normal hearing subjects should be considered when interpreting some SWR results.
在低感觉水平下可记录到的脑干反应的慢波成分，在估计低频听力阈值方面显示出一些前景。本研究描述了30名听力正常受试者中这种慢波反应（SWR）的几种特性，并研究了其与心理物理学阈值的相关性。声学信号为0.25、0.5、1、2和4千赫的短纯音，上升-下降时间为3毫秒，无平台期。重复率为40次/秒。脑电图在平均前经20至1500赫兹滤波。结果显示，SWR阈值平均比行为阈值高约15分贝，然而，范围为0至35分贝感觉级。在深度睡眠状态下，SWR振幅可能大幅下降，阈值可能升高20分贝。SWR似乎有助于估计低频阈值，但在解释一些SWR结果时，应考虑听力正常受试者中35分贝的阈值范围。
