Summary:
The average noise levels during the day is 67.8 decibels (dB), much higher than Delhi that has recorded 61 decibels. The stations are located in Guindy (I), Perambur (C), T Nagar (C), Triplicane (R), Pallikaranai (C), Velachery (R), Washermanpet (C), Anna Nagar (S), Sowcarpet (R) and Egmore Eye Hospital (S). Velachery, a residential area, has also recorded very high noise level as high at 81 dB during the day and night. Even a silent zone like Egmore Eye Hospital, where limit is 50 dB, recorded levels of 71 dB. Epidemiological evidence indicates that those chronically exposed to high levels of environmental noise have an increased risk of heart diseases..