Science
Traffic noise counteracts mental health benefits of birdsong, study finds
Jalopnik reports that background traffic sound reduces mood boosts from nature sounds, even below official safety guidelines.
The short version
- A 2026 University of Surrey study examined how background traffic sound affects the psychological benefits derived from natural birdsong.[Jalopnik]
- Researchers found that even low levels of traffic noise rapidly diminish mood boosts and increase bodily stress indicators.[Jalopnik]
- The negative effects occurred even when traffic noise remained below the World Health Organization's daytime threshold.[Jalopnik]
Key facts
- University of Surrey researchers created nine soundscapes mixing birdsong and traffic noise to evaluate listener responses.[Jalopnik]
- The study included over 1,500 online participants alongside 63 lab subjects monitored by heart-rate sensors.[Jalopnik]
- Psychological improvements from natural soundscapes vanished rapidly when detectable traffic sound was introduced.[Jalopnik]
- Stress responses increased during traffic noise playback even at levels below the WHO daytime traffic noise threshold.[Jalopnik]
What remains uncertain
- It is estimated by some sources that noise pollution accounts for one million healthy life years lost per decade in Europe.[Jalopnik]
Sources
Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.