Noise pollution

Noise pollution is more dangerous than was believed by those who are not direct victims, or are unaware of the physiological and psychological disorders which is the origin and occur more or less long term. The characteristics in decibels Environmental noise can be analyzed in relation to references provided by the "barometer of noise." Barometer of 120 dBA noise Plane on the runway. 110 Orchestra Pop music. 100 Breaker (1 m) Motorcycle full speed (7 m). 90 former Metro Truck (7 m). coffee grinder mixer (60 cm). 80 Carrefour animated. 70 Conversation loudly seen at 50 cm. Residence near a highway . 50 Conversation perceived to 3 m window closed on a busy street. 40 room stay calm. 20 Rustling leaves.