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Long-term versus short-term noise monitoring: Strategies and implications in India

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The paper investigates the accuracy of short-term noise monitoring strategies w.r.t. the long-term noise monitoring. The difference in short-term strategies from the annual average representative values obtained from yearly noise monitoring data is quantified as error. Long-term continuous noise monitoring data in terms of monthly averages for 35 locations spread over 7 major cities of India is analyzed. The analysis shows that the error of _3 dBA from annual equivalent level is calculated with 95% probability for LDay (06-22 h) and LNight (22-06 h) value by adopting 1 month noise monitoring strategy. For higher accuracy, the random 2 months strategy is recommended, whereby an error of _2 dBA is achieved with a probability higher than 90%. The study reveals that short-term noise monitoring strategy followed gives a reliable accuracy levels w.r.t. continuous long-term monitoring and thus offers a best practicable and economical option (BPEO) for noise mapping of larger parts of the country.
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Keywords: 52.1; 56.1

Document Type: Research Article

Affiliations: National Physical Laboratory

Publication date: 01 January 2015

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