The causes of noise pollution.The sound than necessary to cause adverse effects on the health of people, from various sources to many. Important: (Siriporn. The Indus Valley.? 2534: 222-223).1. Transportation. The use of motorcycle, tricycle, cars, trucks and airplanes, more make the volume is increasing as well. May classify show as follows.Motorcycle, tricycle (took) have the Volume 35 decibels.Car audio level 60 - 25 decibels.The truck with sound 95 - 120 decibels.The train ran away 100 feet have the volume 60 decibels.The plane, with sound 100 - 140 decibels.Office of the office of national environment. Determined the volume in a residential neighborhood in the daytime and night, no more than 60 เดซิเบลและ 55 dB, respectively. For the volume. Posted by the traffic office Kingdom caused by the engine or any part of the car. Motorcycles in normal than 95 decibels. When measuring the volume with a sound level meter in distance 7.5 meters around.2. Factories. Sound is caused by the operation of machinery of various sizes, which makes the volume is different from 60 dB until 120 decibels. Depending on the magnitude of machinery. The material used to make the wall or ceiling factory. As well as the environment of the factory.3. From household sound caused by tools, home appliances, such as cutting machine view trade sucker of dust scrubber radio And TV cause volume about 60 - 70 decibels.4. Noise resulting from other causes, including advertising, thunder and lightning, and the quarrel, brawl.
การแปล กรุณารอสักครู่..
