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Cycles are the most economical mode of transport and at the same time eco-friendly. Another added benefit is their efficiency to be noise-less and easily manoeuvrable to move along the roadside during peak traffic rush to record cumulative noise levels along major roads, minor roads and other small lanes winding through many locations under categories such as railways, industrial, commercial, residential and silence zone. Noise monitoring through cycles was carried out along designated routes given to the cyclist to cover more than 6300 location points combining all the 10 cities. This ‘real-time mapping’ of noise levels was carried out during peak rush hours of traffic mainly 09:00 – 11:00 am in the morning and 06:00 – 08:30 pm in the night. Every cycle was mounted with special moulds created for fitting sound level meters to enable the cyclist to easily record the ambient noise levels of the surrounding areas. At each individual location, noise levels were recorded for five minutes at an interval of one second leading to around 300 readings each. Overall, a huge amount of data has been generated for every city in a similar manner. Data analysis includes calculations for the corresponding Leq, Lmax and Lmin in dB (A) during day and night time for the individual location of each city. Furthermore, with the help of latest state-of-the-art GIS software, Strategic and Spatial Noise maps showing noise levels at different locations of the city was generated for each individual city.
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