The Effect of Noise on Sleep

That's like Joe Pesci in My Cousin Vinny where he stays overnight in a cabin and wakes up and freaks out at every little noise, but when he's held in contempt and there's a prison riot going on, he's sleeping like a baby.

Getting blackout curtains and killing off any stray light from clocks was huge for me.

I wake up _super_ easy at many parts of the night, to all kinds of minor sounds. But when I lived directly behind a train, I not only don't recall it waking me up, I distinctly remember that, after getting used to it, it had a kind of calming effect on me. Really interesting. But I wonder if it was still disrupting my sleep and to what degree. I'd mainly like to know in case we have future housing options next to a train because, outside of being near horn / turns, I wouldn't normally worry much about it.

FYI a literature review from a deep research AI ======

The effect of noise on sleep is multifaceted, involving various types of noise exposure, physiological mechanisms, and consequences on sleep quality and health.

I. Introduction Environmental and occupational noise refers to unwanted or harmful sounds from sources such as traffic, aircraft, railways, and workplaces. Noise pollution is a significant public health issue due to its widespread prevalence and impact on sleep and overall health.

II. Types of Noise Exposure

Environmental noise includes road traffic, aircraft, and railway noise. Aircraft noise, for example, has been shown to negatively affect sleep in children, whereas road traffic noise may have less impact on autonomic activity during sleep [Effect of Noise on Sleep and Autonomic Activity in Children]. Occupational noise exposure also contributes to sleep disturbances and has been linked to sleep loss and fragmentation [The effects of occupational noise on sleep]. Intentional masking noise such as white or pink noise is sometimes used as a sleep aid to improve sleep quality in noisy environments [The effects of white noise on sleep].

III. Physiological Mechanisms During sleep, the auditory system continues to process sounds, and noise can lower arousal thresholds, causing awakenings or micro-arousals. Noise exposure activates the autonomic nervous system, increasing heart rate and blood pressure, and stimulates the hypothalamic-pituitary-adrenal (HPA) axis, leading to hormonal and metabolic changes [Environmental noise and sleep disturbances].

IV. Effects on Sleep Architecture Noise exposure reduces total sleep time and sleep efficiency, increases sleep fragmentation, and causes more frequent micro-arousals. It also alters sleep stages by decreasing deep sleep (slow-wave sleep) and REM sleep, which are critical for restorative sleep [Effects of environmental noise on sleep].

V. Health and Daytime Consequences Poor sleep due to noise leads to daytime sleepiness, cognitive impairments, and mood disturbances. Chronic noise-related sleep disruption is associated with increased cardiovascular and metabolic risks, such as hypertension and glucose metabolism disturbances. It also negatively affects quality of life and can contribute to burnout [Environmental Noise and Effects on Sleep], [Effects of personal noise exposure, sleep quality, and burnout].

VI. Vulnerable and Special Populations Children are particularly sensitive to noise, with aircraft noise shown to disrupt their sleep more than road traffic noise. Older adults and individuals with pre-existing sleep disorders are also more vulnerable to noise-induced sleep disturbances [Effect of Noise on Sleep and Autonomic Activity in Children].

VII. Noise as a Sleep Aid Paradoxically, steady background noise such as white or pink noise can improve sleep quality by masking disruptive environmental sounds. Studies have shown that white noise can significantly enhance subjective and objective sleep measures in noisy urban settings. However, potential downsides include hearing damage and psychological dependency on noise for sleep [Noise as a sleep aid: A systematic review], [The effects of white noise on sleep].

VIII. Mitigation and Future Directions Effective strategies to mitigate noise effects on sleep include engineering controls like soundproofing, use of earplugs, and regulatory noise limits. Behavioral interventions and public health policies are also important. Future research is needed to clarify long-term effects, dose-response relationships, and to develop personalized interventions [The Effect of Room Acoustics on the Sleep Quality of Healthy Sleepers].

In summary, noise negatively impacts sleep by disrupting sleep architecture and triggering physiological stress responses, leading to adverse health outcomes. While some forms of noise can aid sleep by masking disturbances, overall noise reduction remains critical for improving sleep quality and health.

References

Environmental noise and sleep disturbances: A threat to health? Demian Halperin et al. Sleep Science, 2014 Nov 15. https://pmc.ncbi.nlm.nih.gov/articles/PMC4608916/ Poor sleep causes measurable changes on these systems. Experimental studies demonstrated that both sleep restriction and poor quality sleep affect glucose ...

Effects of environmental noise on sleep Kenneth I Hume et al. Noise & health, 2012. https://pubmed.ncbi.nlm.nih.gov/23257581/ This paper summarizes the findings from the past 3 year's research on the effects of environmental noise on sleep and identifies key future research goals.

The Effect of Room Acoustics on the Sleep Quality of Healthy Sleepers Ingo Fietze et al. Noise & Health, 2016 Sep-Oct. https://pmc.ncbi.nlm.nih.gov/articles/PMC5187651/ Noise is one of the factors that can seriously disturb sleep, and sound volume is an important factor in this context. One strategy involves avoiding ...

Noise as a sleep aid: A systematic review Samantha M. Riedy et al. Sleep Medicine Reviews, 2021/02/01. https://www.sciencedirect.com/science/article/abs/pii/S10870... ... sleep aid, especially since it may also negatively affect sleep and hearing. ... Suzuki et al. Sleep deepening effect of steady pink noise. J Sound Vib. (1991).

Environmental Noise and Effects on Sleep: An Update to the WHO Systematic Review and Meta-Analysis Michael G Smith et al. Environmental Health Perspectives, 2022 Jul 11. https://pmc.ncbi.nlm.nih.gov/articles/PMC9272916/ Jul 11, 2022 ... To what extent have the following outcomes of railway noise occurred in the past 12 months? Railway noise disturbs when falling asleep. Not ...

Effects of personal noise exposure, sleep quality, and burnout on quality of life: An online participation cohort study in Taiwan Ta-Chien Chan et al. Science of The Total Environment, 2024/03/10. https://www.sciencedirect.com/science/article/pii/S004896972... Mar 10, 2024 ... To our knowledge, this is the first study to explore the pathways through which daily noise exposure, sleep quality, and personal burnout affect ...

Effect of Noise on Sleep and Autonomic Activity in Children according to Source https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8476937/ Road traffic noise did not significantly alter sleep or autonomic activity in children, whereas aircraft noise exerted a negative effect on sleep.

The effects of occupational noise on sleep: A systematic review Saeid Yazdanirad et al. Sleep Medicine Reviews, 2023/12/01. https://www.sciencedirect.com/science/article/abs/pii/S10870... One of the important effects due to noise exposure is sleep loss/disturbance, which has received less attention. Sleep disturbance is defined as problems with ...

The effects of white noise on sleep and duration in individuals living in a high noise environment in New York City Matthew R Ebben et al. Sleep medicine, 2021/7. https://pubmed.ncbi.nlm.nih.gov/34049045/ Our data show that white noise significantly improved sleep based on subjective and objective measurements in subjects complaining of difficulty sleeping.

The requirements are that it be heard in all directions, including straight up.