Thiessen G J, Lapointe A C
J Acoust Soc Am. 1983 Jan;73(1):225-9. doi: 10.1121/1.388853.
When subjected to alternating quiet nights (32 dB) and noise nights (equivalent levels of 47 dB) a group of 14 subjects showed an average increase in the fraction of deep sleep of about 2.5% resulting from the traffic noise. Another group of 12 subjects whose noise nights were at 60 dB had an average of 4.6% increase in deep sleep during these nights. The number of wakings also increased for both groups but, as was found before, this adapted rapidly with the number of nights. The average latency of sleep onset does not appear to be affected by the traffic noise but individual differences are great and may be of opposite sign. Latency of sleep onset and waking both show appreciable "laboratory effect" which takes longer to disappear than the one or two nights usually assumed.
当14名受试者经历交替出现的安静夜晚（32分贝）和噪音夜晚（等效水平为47分贝）时，交通噪音使他们的深度睡眠比例平均增加了约2.5%。另一组12名受试者，其噪音夜晚的噪音水平为60分贝，在这些夜晚深度睡眠平均增加了4.6%。两组受试者的觉醒次数也都增加了，但正如之前所发现的，这会随着夜晚数量迅速适应。睡眠开始的平均潜伏期似乎不受交通噪音的影响，但个体差异很大，可能呈现相反的趋势。睡眠开始潜伏期和觉醒都表现出明显的“实验室效应”，其消失所需的时间比通常认为的一两个晚上要长。
