We live in a world full of chaos and noise! This too is a form of pollution that is often overlooked, but which can cause serious damage to human ... Noise pollution is caused by excessive exposure to sounds and noises of high intensity . This situation can be created in cities and in natural environments. The law provides the definition of noise pollution, "the introduction of noise in the living or the external environment likely to cause annoyance or disturbance to rest and to human activities, risk to human health, deterioration of ecosystems, property , monuments, living environment or outdoor environment or that interferes with the legitimate fruition environments themselves "The noise propagates in the air but also in the materials. The propagation speed is different depending on the material crossed. Some materials are able to reduce the speed of sound absorbing and partly for this characteristic are called absorbing. It 's very important to keep in mind the characteristics of materials when building in order to achieve good sound insulation and so protect our hearing!
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