Road noise link to blood pressure

"People living near noisy roads are at greater risk of developing high blood pressure, a Swedish study suggests. A Lund University team found risk rose above an average daily exposure of 60 decibels, which accounts for about one in four people in western Europe. They said it was likely noise caused stress - and maybe sleep disruption - leading to blood pressure problems. But UK experts questioned the findings, saying other factors such as diet and smoking were more important. Researchers analysed questionnaires completed by nearly 28,000 people as well as analysing neighbourhood traffic noise" - BBC