The paper analyzes the errors associated with short-term and temporal noise monitoring strategies in Indian perspectives. The study recommends that random strategies offer to be cost-effective approach in noise monitoring as compared to the complicated and costly long-term noise monitoring. The study recommends the random strategies serve to be the best substitute to long-term noise monitoring for achieving higher accuracy, reducing the costs and noise assessment of larger parts of the metropolitan cities of India. Such a strategy can be used for noise monitoring of the larger number of sites of the urban agglomerations with the existing Noise Monitoring Terminals (NMTs) deployed for 24 hours throughout the year at some dedicate sites only.

The paper extensively reviews the recent studies conducted on environmental noise monitoring and control using smartphone applications. The methodologies and procedures adapted by several researchers utilizing smartphone technology has been summarized. The study also discusses the various methods of calibration and the calibration factor observed for smartphone when compared to sound standard. This study concludes that the smartphone applications is an easy, cheap and convenient technology as compared to the conventional technology provided the calibration of smart phone microphone is undertaken with reference to sound standard and free-field microphone for environmental noise measurements.

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