Effect of White Noise on Sleep in Patients Admitted to a Coronary Care

Afshar, Pouya Farokhnezhad; Bahramnezhad, Fatemeh; Asgari, Parvaneh; Shiri, Mahmoud Mousavi

doi:10.15171/jcs.2016.011

Cited by 59 publications

(28 citation statements)

References 22 publications

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“…Thus, white noise is clearly less damaging to the vasculature within this short time frame compatible with recent observations that white noise can even provide benefit for patients undergoing coronary bypass surgery, probably by masking other annoying and potentially stress-inducing background noise in the coronary care unit. 38 …”

Section: Discussionmentioning

confidence: 99%

Effects of noise on vascular function, oxidative stress, and inflammation: mechanistic insight from studies in mice

Münzel

Daiber

Steven

et al. 2017

European Heart Journal

210

249

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AimsEpidemiological studies indicate that traffic noise increases the incidence of coronary artery disease, hypertension and stroke. The underlying mechanisms remain largely unknown. Field studies with nighttime noise exposure demonstrate that aircraft noise leads to vascular dysfunction, which is markedly improved by vitamin C, suggesting a key role of oxidative stress in causing this phenomenon.Methods and resultsWe developed a novel animal model to study the vascular consequences of aircraft noise exposure. Peak sound levels of 85 and mean sound level of 72 dBA applied by loudspeakers for 4 days caused an increase in systolic blood pressure, plasma noradrenaline and angiotensin II levels and induced endothelial dysfunction. Noise increased eNOS expression but reduced vascular NO levels because of eNOS uncoupling. Noise increased circulating levels of nitrotyrosine, interleukine-6 and vascular expression of the NADPH oxidase subunit Nox2, nitrotyrosine-positive proteins and of endothelin-1. FACS analysis demonstrated an increase in infiltrated natural killer-cells and neutrophils into the vasculature. Equal mean sound pressure levels of white noise for 4 days did not induce these changes. Comparative Illumina sequencing of transcriptomes of aortic tissues from aircraft noise-treated animals displayed significant changes of genes in part responsible for the regulation of vascular function, vascular remodelling, and cell death.ConclusionWe established a novel and unique aircraft noise stress model with increased blood pressure and vascular dysfunction associated with oxidative stress. This animal model enables future studies of molecular mechanisms, mitigation strategies, and pharmacological interventions to protect from noise-induced vascular damage.

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Section: Discussionmentioning

confidence: 99%

Effects of noise on vascular function, oxidative stress, and inflammation: mechanistic insight from studies in mice

Münzel

Daiber

Steven

et al. 2017

European Heart Journal

210

249

View full text Add to dashboard Cite

show abstract

“…They demonstrated that both the arousal index at baseline and during white noise administration were significantly inferior as compared to the night with simulated ICU noise exposure. Similarly, a recent study ( 18 ) showed better scores in the PSQI in 30 ICU patients exposed to broadband sound as compared to another 30 patients who were not. However, the effect of broadband sound in the environmental low noise setting remains unclear.…”

Section: Introductionmentioning

confidence: 61%

Broadband Sound Administration Improves Sleep Onset Latency in Healthy Subjects in a Model of Transient Insomnia

et al. 2017

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BackgroundInsomnia is a major public health problem in western countries. Previous small pilot studies showed that the administration of constant white noise can improve sleep quality, increase acoustic arousal threshold, and reduce sleep onset latency. In this randomized controlled trial, we tested the effect of surrounding broadband sound administration on sleep onset latency, sleep architecture, and subjective sleep quality in healthy subjects.MethodsEighteen healthy subjects were studied with two overnight sleep studies approximately one week apart. They were exposed in random order to normal environmental noise (40.1 [1.3] dB) or to broadband sound administration uniformly distributed in the room by two speakers (46.0 [0.9] dB). To model transient insomnia, subjects went to bed (“lights out”) 90 min before usual bedtime.ResultsBroadband sound administration reduced sleep onset latency to stage 2 sleep (time from lights out to first epoch of non-rapid eye movement-sleep stage 2) (19 [16] vs. 13 [23] min, p = 0.011; median reduction 38% baseline). In a subgroup reporting trouble initiating sleep at home (Pittsburgh Sleep Quality Index section 2 score ≥ 1), sound administration improved subjective sleep quality (p = 0.037) and the frequency of arousals from sleep (p = 0.03).ConclusionIn an experimental model of transient insomnia in young healthy individuals, broadband sound administration significantly reduced sleep onset latency by 38% compared to normal environmental noise. These findings suggest that broadband sound administration might be helpful to minimize insomnia symptoms in selected individuals.

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“…All participants were interviewed by the researchers, who excluded those with sleep disorders, circadian rhythm problems, psychiatric disorders, and hearing problems, those taking sleep promoting or altering medications, those who were smokers, those who were obese (body mass index >30 kg/m 2 ), and those who were living in a noisy environment. Based on previous studies, the annoyance by outdoor and indoor noise sources was determined by the question, “Thinking about the last 12 months, when you are at home, how much would you say noise from the following sources (road noise, neighbor flat noise, parking noise, airplane noise, commercial noise, and train noise) bothers or annoys you?”[4619] The strength of noise annoyance was rated by the five-step International Commission on Biological Effects of Noise scale of none, slight, moderate, strong, and too extreme. [4619] Those who scored “none” or “slight” were included in the study.…”

Section: Methodsmentioning

confidence: 99%

“…Based on previous studies, the annoyance by outdoor and indoor noise sources was determined by the question, “Thinking about the last 12 months, when you are at home, how much would you say noise from the following sources (road noise, neighbor flat noise, parking noise, airplane noise, commercial noise, and train noise) bothers or annoys you?”[4619] The strength of noise annoyance was rated by the five-step International Commission on Biological Effects of Noise scale of none, slight, moderate, strong, and too extreme. [4619] Those who scored “none” or “slight” were included in the study. In addition, individuals who co-sleep in the same bed or room with another individual or those who attend and take care of others (e.g., parents or children) were excluded.…”

Section: Methodsmentioning

confidence: 99%

“…White noise makes hearing threshold level reaching its maximum rate, which means that in the presence of such sounds in the background of the environment, the more intense auditory stimuli are less capable of stimulating the cerebral cortex during sleep. [6] Overall, masking ambient noise with white noise has been proposed to improve sleep quality. A study conducted on guinea pigs showed that deaf guinea pigs presented an increase in both slow-wave sleep and rapid eye movement (REM) sleep compared to controls, thus showing that the auditory system modulates central nervous system structures that are involved in the sleep-wake cycle.…”

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confidence: 99%

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The effect of air conditioner sound on sleep latency, duration, and efficiency in young adults

et al. 2019

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BACKGROUND:Many individuals complain of disturbed sleep during the wintertime when their air conditioner (AC) is off. Therefore, we conducted this study to objectively assess the impact of AC sound on sleep latency, sleep duration, and sleep efficiency.METHODS:An experimental study was conducted on 48 healthy young adults, in their homes, to assess the effect of a standardized AC white noise, on sleep latency, duration, and efficiency, while simultaneously monitoring light intensity and room temperature. The study was conducted during the winter months. Sleep quality was objectively assessed using sleep actigraphy. Participants were monitored for two nights, during which two different, randomized sets of conditions were used: During one of the nights, the adults were exposed to 43 dB AC white noise; during the other night, adults were not exposed to the AC white noise.RESULTS:Actigraphy results showed that the mean sleep duration during the AC sound nights (ASNs) was 466.8 ± 60.8 min, compared to 478.8 ± 55.4 min during the non-AC sound nights (NASNs) (P = 0.6). Sleep-onset latency was 10.8 ± 15.2 min and 15.1 ± 18.2 min during the ASNs and the NASNs, respectively (P = 0.8). Moreover, there was no difference in sleep efficiency, 81% ± 7.8% vs. 78.8% ± 15.4% in the ASNs and NASNs, respectively (P = 0.9).CONCLUSION:AC sound had no significant positive effect on sleep duration, latency, and efficiency.

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Effect of White Noise on Sleep in Patients Admitted to a Coronary Care

Cited by 59 publications

References 22 publications

Effects of noise on vascular function, oxidative stress, and inflammation: mechanistic insight from studies in mice

Effects of noise on vascular function, oxidative stress, and inflammation: mechanistic insight from studies in mice

Broadband Sound Administration Improves Sleep Onset Latency in Healthy Subjects in a Model of Transient Insomnia

The effect of air conditioner sound on sleep latency, duration, and efficiency in young adults

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