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Environmental noise-induced cardiovascular responses during sleep
Bastien Lechat1, Hannah Scott1, Felix Decup2
1Adelaide Institute for Sleep Health and FHMRI Sleep Health, Flinders University, Bedford Park, Adelaide, South Australia 5042, Australia.
Sleep
|December 29, 2021
Summary
Cardiovascular responses, specifically pulse wave amplitude drops, can indicate sleep disruption from environmental noise. Even low noise levels (39 dBA) can trigger these responses, suggesting sensitivity to noise pollution.
Area of Science:
- Environmental Health
- Cardiovascular Physiology
- Sleep Science
Background:
- Environmental noise, including wind farms and traffic, can disrupt sleep.
- Cardiovascular responses are potential indicators of physiological stress due to noise exposure.
- Understanding noise disruption effects is crucial for public health.
Purpose of the Study:
- To evaluate cardiovascular responses as markers for environmental noise disruption during sleep.
- To compare the effects of wind farm noise versus traffic noise on cardiovascular activity.
- To determine the sensitivity of cardiovascular markers to varying noise pressure levels.
Main Methods:
- Twenty participants underwent polysomnography (sleep monitoring).
- Exposure to wind farm and traffic noise at six sound pressure levels (33-48 dBA).
- Cardiovascular responses (pulse wave amplitude changes) were measured using electrocardiogram and pulse oximetry.
Main Results:
- Higher sound pressure levels increased the likelihood of pulse wave amplitude drops.
- Responses were observed at sound pressure levels as low as 39 dBA.
- Wind farm noise with amplitude modulation showed a trend towards fewer responses, requiring further investigation.
Conclusions:
- Drops in pulse wave amplitude are sensitive markers of noise-induced cardiovascular responses during sleep.
- Preliminary data suggest differences in noise disruption effects between noise types.
- Larger studies are needed to confirm these findings and explore long-term health implications.
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