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Noise pollution may be defined as unwanted sound which is annoying and irritating to human beings and has several ill health effects. A rapid increase in population and subsequent urbanization has resulted in increase of noise pollution in urban areas. The Noise pollution in urban areas is majorly caused by transportation activities followed by industrial activities.The study area considered in the present research work is Mumbai metropolitan area. It is the financial, commercial and entertainment capital of India. The total geographical area of Mumbai is 518.1 km2 with a population of approx. 1.2 crore (Census 2011). Being a densely populated area, Mumbai exposes to a high Magnitude of Noise pollution due to transportation and other activities. Hence, the present study aims conduct a proper noise pollution monitoring study which would further help in noise pollution regulation and mitigation. As the sound pressure level measured by sound level meters gives points values, it is difficult to draw inferences and identifying hot spots for noise pollution mitigation. Hence, spatial continuous surfaces are required to understand the variation of the continuous equivalent sound level (Leq) over the urban area. Hence, in the present study, a methodology for strategic noise map is developed by geo-statistical analysis considering point and line sources of noise over the Mumbai city area. Noise monitoring was carried out for 24 hours during working and non-working day at various locations namely residential, commercial, industrial and silence zones as well as near noise generating sources like expressway, national and state highway, major road, minor road, railways, metro rail, construction site etc. The strategic maps are generated for both day and night time in working and non-working days. Strategic maps help in identifying the hot spots of noise pollution in the city. Based on the strategic noise map and data collection, recommendations are provided to reduce the noise pollution in the city.
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