Advancing urban noise monitoring: bridging cost and Class 1 accuracy performance in smart city applications

This paper extends the "Development Of Low-Cost Noise Monitoring Terminals (NMT) Based On MEMS Microphones" from Internoise 2022, introducing a cost-effective solution for urban noise monitoring in smart cities, the Svantek model SV 303. Compliant with Class 1 standards (IEC 61672-1:2013 and IEC 61260-1:2014), this terminal offers a 30 dBA to 130 dB RMS operating range, ideal for urban environments, and ensures Class 1 accuracy. A significant focus of this development is on achieving excellent directional characteristics, crucial for effective "urban noise" measurements. The terminal also boasts the best environmental performance among our NMTs, operating reliably from -20 °C to 50 °C in diverse urban settings. Equipped with USB 2.0 and UART interfaces, it integrates seamlessly into existing urban monitoring systems, accommodating a wide range of devices. This adaptability is essential for smart city applications. The paper explores the design, operational parameters, and integration potential of the terminal. By merging high-performance noise monitoring with cost efficiency, the terminal emerges as a key advancement in smart city noise monitoring, offering a practical solution for accurate, large-scale urban noise evaluation.