According to the Australian Academy of Science, “Noise pollution can be defined as any unwanted or offensive sounds that unreasonably intrude into and disturb our daily lives”. The noise pollution, is an undesirable sound of any intensity, which interacts and interferes with human beings and that always causes uncomfortable and unpleasant sensation.
There are three sources of noise generators:
1. Natural Sources: noise where no human hands involved, for example, thunder, volcanoes, blizzards, cataracts, among others.
2. Point Sources: As equipment and industrial machinery, equipment and appliances, among others.
3. Mobile Sources: Noise from motor vehicles and airplanes, automobiles, trains, motorcycles, among others.
The industrial and urban growth has influenced the generation of noise, and for this reason it is considered one of the factors that produce effects on health of living beings.
Noise damage is not limited to the ear. The hearing, and a communication function with our environment and our fellow, is also a warning system linked with other organs. For this reason, excessive noise exposure can trigger side effects: rapid pulse (tachycardia) and elevated blood pressure, increase respiratory rate, increased stomach acid secretion and secretion of adrenal hormones, difficulty concentrating, restlessness, irritability, sleep disturbance and fatigue. Noise is a risk factor for the health of children and adversely affects their learning. When they are educated in a noisy environment become less attentive to the sound signals, and are disrupted in their ability to listen and a delay in learning to read. Verbal communication difficult, favoring isolation, lack of sociability and also increases the risk of stress. According to the website greenliving, “Noise disturbs feeding and breeding patterns of some animals and has been identified as a contributing factor of the extinction of some species”. In the case of owls and bats, they are guided by the sound to find and hunt their prey. Laboratory studies have shown that bats avoid hunting in noisy areas.
For more information, visit this link:
http://www.greenlivingtips.com/articles/215/1/Noise-pollution.html
