According to the study, every 11.5-decibel increase in road traffic noise at the most exposed side of a residence was associated with a 3 percent rise in Parkinson’s disease risk during the study period. Their results suggest that access to a quieter area of a residence may lessen the association between traffic noise and Parkinson’s risk. Parkinson’s disease is a brain disorder that gradually gets worse over time, affecting a person’s ability to move and maintain balance. The study does not show that traffic noise causes Parkinson’s disease. Reference:Mette Sørensen, Ph.D.; Aslak Harbo Poulsen, Ph.D.; Ole Raaschou-Nielsen, Ph.D.; Lau Caspar Thygesen, Ph.D.; Jørgen Brandt, Ph.D.; Christopher Andersen, Ph.D.; Thomas Münzel, MD, Ph.D.JAMA Neurol.