Study Links 11.5dB Traffic Noise Rise to 3% Higher Parkinson's Risk
Updated
Updated · The Guardian · Jul 23
Study Links 11.5dB Traffic Noise Rise to 3% Higher Parkinson's Risk
3 articles · Updated · The Guardian · Jul 23
Summary
A JAMA Neurology study of 3.1 million Danes aged 40 and over found Parkinson’s risk rose 3% over 18 years for every 11.5dB increase in road traffic noise at a home’s most exposed side.
Researchers said the association fits known pathways in which chronic noise disrupts sleep and triggers stress responses, while a quieter side of the home may help mitigate the effect.
The analysis adjusted for air pollution and found a consistent link across education and income levels, but it lacked lifestyle data, leaving causation unproven.
Outside experts said the findings strengthen the case for noise as a credible Parkinson’s risk factor, though they cautioned it may also reflect broader socioeconomic stress and called for cuts to main-road noise.
The study adds noise pollution to a prevention debate long centered on toxins such as air pollution, microplastics and pesticides; chronic noise above WHO thresholds affects nearly one-third of Europeans.
A major Danish study published in JAMA Neurology on July 23, 2026, found a significant link between long-term exposure to residential road traffic noise and a higher risk of developing Parkinson's disease. Involving 3.1 million residents aged 40 and above, researchers tracked 10 years of noise exposure and identified over 20,000 new Parkinson's cases. The report highlights that the constant noise of urban life may contribute to neurodegenerative diseases, raising urgent public health concerns and emphasizing the need to consider environmental noise as a potential risk factor for Parkinson's.