Night-time traffic noise worsened next-morning vessel function in a controlled study
Healthy adults had lower flow-mediated dilation and poorer reported sleep after noisy nights. The experiment measured short-term responses, with no evidence about later cardiovascular disease.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Recorded traffic noise during sleep reduced next-morning blood-vessel dilation compared with the control condition. Participants also reported poorer sleep and showed increases in heart-rate measures. The experiment supports an immediate physiological response to night-time noise, but it does not establish how repeated exposure would affect long-term cardiovascular outcomes or quantify an individual's disease risk.
This abstract-based account concerns acute responses in healthy adults. It cannot establish lasting vascular damage, future cardiovascular events or the effects of long-term noise exposure.
What researchers found
Next-morning flow-mediated dilation
After 60 recorded noise events versus the control night; P < 0.0001. These are measured dilation percentages, not disease-risk estimates.
What vessel dilation measures
Flow-mediated dilation measures how blood vessels widen. It was the primary endpoint, tested the morning after each exposure. Sleep ratings and heart-rate measures were secondary outcomes, linking overnight exposure with immediate physiological and self-reported changes.
Other biological results differed
Routine blood chemistry showed no statistically significant change. Protein-pattern differences were reported in participants with the largest vessel-function impairments, so those biological signals should not be assumed to characterize every participant's response.
The original publication
A randomized, double-blind, crossover study of acute low-level night-time road traffic noise: effects on vascular function, sleep, and proteomic signatures in healthy adults.
Hahad O, Foos P, Hübner J et al.
Cardiovasc Res · 2026
- PubMed ID
- 41740584
- Record checked
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