Laboratoire de Psychologie des Cognitions, Université de Strasbourg, 12 rue Goethe, 67000, Strasbourg, France.
Eur J Appl Physiol. 2010 Mar;108(4):671-80. doi: 10.1007/s00421-009-1270-8. Epub 2009 Nov 10.
The aim of this study was to investigate the effects of nocturnal railway noise on cardiovascular reactivity in young (25.8 +/- 2.6 years) and middle-aged (52.2 +/- 2.5 years) adults during sleep. Thirty-eight subjects slept three nights in the laboratory at 1-week interval. They were exposed to 48 randomized pass-bys of Freight, Passenger and Automotive trains either at an 8-h equivalent sound level of 40 dBA (Moderate) and 50 dBA (High) or at a silent Control night. Heart rate response (HRR), heart response amplitude (HRA), heart response latency (HRL) and finger pulse response (FPR), finger pulse amplitude (FPA) and finger pulse latency (FPL) were recorded to measure cardiovascular reactivity after each noise onset and for time-matched pseudo-noises in the control condition. Results show that Freight trains produced the highest cardiac response (increased HRR, HRA and HRL) compared to Passenger and Automotive. But the vascular response was similar whatever the type of train. Juniors exhibited an increased HRR and HRA as compared to seniors, but there was no age difference on vasoconstriction, except a shorter FPL in seniors. Noise level produced dose-dependent effects on all the cardiovascular indices. Sleep stage at noise occurrence was ineffective for cardiac response, but FPA was reduced when noise occurred during REM sleep. In conclusion, our study is in favor of an important impact of nocturnal railway noise on the cardiovascular system of sleeping subjects. In the limit of the samples studied, Freight trains are the most harmful, probably more because of their special length (duration) than because of their speed (rise time).
本研究旨在探讨夜间铁路噪声对年轻（25.8 +/- 2.6 岁）和中年（52.2 +/- 2.5 岁）成年人睡眠时心血管反应性的影响。38 名受试者在实验室中每隔一周睡眠三晚。他们分别暴露于 48 次随机通过的货运、客运和汽车列车，等效声级分别为 40 dBA（中度）和 50 dBA（高度）或安静的对照夜。记录心率反应（HRR）、心率反应幅度（HRA）、心率反应潜伏期（HRL）和指脉搏反应（FPR）、指脉搏幅度（FPA）和指脉搏潜伏期（FPL），以测量每次噪声起始后的心血管反应，并在对照条件下进行时间匹配的伪噪声。结果表明，与客运和汽车列车相比，货运列车产生的心脏反应最高（HRR、HRA 和 HRL 增加）。但无论列车类型如何，血管反应都相似。与老年人相比，年轻人的 HRR 和 HRA 增加，但血管收缩没有年龄差异，除了老年人的 FPL 较短。噪声水平对所有心血管指数均产生剂量依赖性影响。噪声发生时的睡眠阶段对心脏反应没有影响，但当噪声发生在 REM 睡眠期间时，FPA 会降低。总之，我们的研究表明夜间铁路噪声对睡眠受试者的心血管系统有重要影响。在研究的样本范围内，货运列车的危害最大，这可能更多是因为它们的特殊长度（持续时间），而不是因为它们的速度（上升时间）。
