The research and development of the new objective audiometry technique using an auditory steady-state response (ASSR) in sleeping subjects

我们分析了不同睡眠阶段的ASSR信号与背景噪声的对比。噪声水平在N3（深睡眠）和REM（快速眼动睡眠）阶段特别低，而睡眠阶段之间的响应信号没有显著差异。因此，在阶段N2、N3和REM中的信噪比（SNR）都很高。因此，在估计ASSR听力水平时，应考虑睡眠阶段。

We analyzed the ASSR signal in contrast to the background noise at different sleep stages. The noise level was especially low in stage N3 (deep sleep) and REM (rapid eye movement sleep), whereas there was no significant difference in the response signals among sleep stages. Consequently, the signal-to-noise ratio (SNR) was high in both stage N2, N3 and REM. Hence, sleep stage should be taken into account when estimating the hearing level fromASSR.