Health Canada, Environmental and Radiation Health Sciences Directorate, Consumer & Clinical Radiation Protection Bureau, Ottawa, ON, Canada.
Health Canada, Population Studies Division, Biostatistics Section, Ottawa, ON, Canada.
Sleep. 2021 Sep 13;44(9). doi: 10.1093/sleep/zsab070.
Studies have yielded inconsistent evidence for an association between long-term average wind turbine sound pressure level (SPL) and disturbed sleep. Transient changes in sleep may be more susceptible to short-term variations in wind turbine SPL throughout the sleep period time. We analyzed sleep actigraphy data (participant sleep nights = 2,094, males = 151, females = 192) in 10 min intervals time-synchronized to wind turbine supervisory control and data acquisition. Calculated indoor wind turbine SPL was considered after adjusting for turbine rotor speed and closed/open bedroom windows. Maximum calculated nightly average wind turbine SPL reached 44.7 dBA (mean = 32.9, SD = 6.4) outdoors and 31.4 dBA (mean = 12.5, SD = 8.3) indoors. Wind turbine SPL in 10 min intervals, and nightly averages, was not statistically associated with actigraphy outcomes. However, the variability in wind turbine SPL due to changes in wind turbine operation across the sleep period time, as measured by the difference between the 10 min SPL and the nightly average SPL (∆SPL), was statistically related to awakenings (p = 0.028) and motility (p = 0.015) rates. These diminutive differences translate to less than 1 min of additional awake and motility time for a 5 dBA increase over a 450 min sleep period time. Overall results showed that wind turbine SPL below 45 dBA was not associated with any consequential changes in actigraphy-measured sleep. Observations based on ∆SPL provided some indication that a more sensitive assessment of sleep may be one that considers variations in wind turbine SPL throughout the sleep period time.
研究结果表明，长期平均风力涡轮机声压级（SPL）与睡眠障碍之间的关联存在不一致的证据。睡眠的瞬态变化可能更容易受到睡眠期间风力涡轮机 SPL 的短期变化的影响。我们分析了睡眠活动记录仪数据（参与者睡眠夜数=2094，男性=151，女性=192），每隔 10 分钟与风力涡轮机监控和数据采集时间同步。在考虑涡轮机转子速度和卧室窗户关闭/打开的情况下，计算出室内风力涡轮机 SPL。夜间平均最大计算风力涡轮机 SPL 达到 44.7 dBA（平均值=32.9，SD=6.4）室外和 31.4 dBA（平均值=12.5，SD=8.3）室内。10 分钟间隔内的风力涡轮机 SPL 以及夜间平均值与活动记录仪结果无统计学关联。然而，由于风力涡轮机在睡眠期间的运行变化导致的风力涡轮机 SPL 变化，如 10 分钟 SPL 与夜间平均 SPL 之间的差异（∆SPL）所测量的，与觉醒（p=0.028）和运动（p=0.015）率有统计学关系。这些微小的差异转化为在 450 分钟的睡眠期间内，5 dBA 的增加会导致额外的 1 分钟清醒和运动时间。总体结果表明，45 dBA 以下的风力涡轮机 SPL 与活动记录仪测量的睡眠没有任何明显变化。基于 ∆SPL 的观察结果表明，更敏感的睡眠评估可能是考虑整个睡眠期间风力涡轮机 SPL 变化的评估。
