Noise pollution is excessive, displeasing human, animal or machine-created environmental noise that disrupts the activity or balance of human or animal life. The word noise comes from the Latin word nauseas, meaning seasickness. The source of most outdoor noise worldwide is mainly construction and transportation systems, including motor vehicle noise, aircraft noise and rail noise. Poor urban planning may give rise to noise pollution, since side-by-side industrial and residential buildings can result in noise pollution in the residential area. Indoor and outdoor noise pollution sources include car alarms, emergency service sirens, mechanical equipment, fireworks, compressed air horns, grounds keeping equipment, barking dogs, appliances, lighting hum, audio entertainment systems, electric megaphones, and loud people.
Noise Pollution causes
The sources/causes of noise pollution increased or probably originated with the invention of machines. Let us have a look at the various noise pollution causes in detail.
Traffic: It is the biggest source of noise pollution in today's times, especially in urban areas. In the past few years the number of automobile vehicles has increased manifold. Thus, traffic problems created by these vehicles is an important source of noise pollution. The sound produced by the exhaust systems of trucks, autos, buses, motorcycles, etc. cause a lot of noise.
Railway Stations: Locomotive engines of trains are an important source of noise pollution. Besides, the shunting and switching operations in rail yards too cause noise pollution to a great extent. The whistles and horns being used by the railway employees add to the effect and increase noise pollution.
Aircrafts: The national parks and wastelands were earlier considered to be the pollution free zones and people traveled to these places for relaxation. Nowadays, however, the sound created by low flying military aircrafts causes noise pollution in these areas too.
Industrial Noise: The various machines used in industries are also a major cause of noise pollution. The different machines which are responsible for creating noise include the compressors, motors and other machinery. It is therefore recommended to grow trees in the premises of industries, which act as absorbents of noise. The trees grown in the premises of 'Tata Motors' an automobile company based in India is a perfect example of how to reduce noise pollution in the industrial belts. Read more on effects of industrial noise pollution.
Construction Equipment: The different types of machines and equipments used in construction of roads and buildings are also an important cause behind noise pollution. The machinery used for the purpose of construction includes pneumatic hammers, bulldozers, air compressors, dump trucks, loaders, pavement breakers, etc. is also responsible for noise pollution to a great extent.
Household Equipment: The household equipments are amongst the minor contributors to noise pollution. These machines include mixers, vacuum cleaners and other noise creating equipments. The effects of noise pollution caused by these machines shouldn't be neglected. This is because one has to work in close contact with the equipments and the magnitude of sound that one need to bear is high.
Other Causes: The boilers, plumbing equipment, air conditioners, generators and fans contribute to noise pollution to some extent. Noise created by people in public places too is a major contributor amongst different sources. Loudspeakers used in public places are responsible for creating noise of a high degree/amplitude. Effects
Main article: Noise health effects
Noise health effects are both health and behavioral in nature. The unwanted sound is called noise. This unwanted sound can damage physiological and psychological health. Noise pollution can cause annoyance and aggression, hypertension, high stress levels, tinnitus, hearing loss,...
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