![]() ![]() The natural environment is filled with various sounds – thunderstorms, lightning, tornado, cyclone, volcanic eruptions, earthquakes, landslides, sounds produced by animals, and rapidly falling water. The sources of noise pollution are divided into two categories: But measurement of sound in most big cities exceeds 90 decibels. The World Health Organization considers the sound of 45 decibels ideal for cities. Considering the side effects on human health, scientists have set the maximum sound limit, ranging from 75 to 85 dB in different countries. In daily life, we hear different intensity of sounds, whose level ranges from 10 to 100 decibels. In fact, any unwanted noise arising in the environment, which has adverse effects on the health of the organism, is noise pollution. Anyway, all the sounds come under noise pollution which makes the mind turbulent or restless. Normally, sounds more intense than 30 decibel are called noise. A person can bear the noise up to 85 decibels, after which his hearing power can be damaged. The noise intensity is measured in decibels or dB. ![]() In fact, when the sound exceeds its limit, it becomes fatal for human and other organisms. Noise pollution is dependent on the loudness and frequency of the sound. Noise pollution means an unwanted or undesirable sound that leads to physical and mental problems.
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