Unseen danger - Noise Pollution

It occurs in a particular environment
where the sound changes the normal condition of hearing. Although it does not
accumulate in the environment, like other types of pollution, it causes severe
damage to the body and to the quality of life.
The WHO (World Health Organization)
considers that a sound should be as much as 50 db in order not to cause harm to
humans. From 55 db on, the negative effects start. Sounds above 130 dB even
cause pain and noise of 140 dB can totally destroy the eardrum.
Some problems caused by the noise
pollution are insomnia, stress, depression, aggressiveness, loss of attention
and concentration, loss of memory, headaches, increased blood pressure,
tiredness, bad performances in school and work, and in more severe cases,
deafness. Only by strokes, there are 210 000 fatalities every year, says a WHO
report. Some problems may occur in the short time, others take years to get
noticed.

Although not a topic much discussed
lately, is necessary to become aware of this problem and avoid it, because as
mentioned before, even if the consequences delays, high noises interferes on
health and welfare of the general population. Therefore, is necessary a greater
concern on this issue by all the people. Also, a way to reduce this problem
would be to press the government for oversight and setting maximum decibel
level in certain ambients, especially in urban ambients, where there is a prevalence
of high levels, then, people will not have many problems with these “unseen
danger”.
Bibliography:
http://www.suapesquisa.com/pesquisa/poluicao_sonora.htm
http://saude.abril.com.br/edicoes/0295/medicina/conteudo_269612.shtml
http://miniquim.wikispaces.com/8%C2%BAC+-+Som+e+Luz+-+Polui%C3%A7%C3%A3o
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