Ecological Systems and Devices Annotation << Back Development of an Urban Acoustic Impact Assessment System Using an Internet of Things Platform Kabonen A.V., Simonova A.A., Kuvshinov K.A., Grafova E.O. This study assessed the urban environment's ecological status on two high-traffic streets in a city of 250 000 inhabitants located in Northwestern Russia. The assessment was conducted using a multisensory electronic device managed by an IoT platform. Data collected from measurements in the city's central area along two key thoroughfares, from April to October 2024, were analyzed. A mechanism for identifying changes in noise levels at different times of day during the monitored months is presented. Statistically signifi cant noise levels were identifi ed and processed in the R programming environment using basic functions and a two independent samples comparison method. The reliability of differences in statistical indicators was assessed using the Shapiro-Wilk and Fisher's tests. For comparing arithmetic means, Student's t-test and Welch's t-test were applied. The Wilcoxon-Mann-Whitney test was used for cases where samples deviated from normality. The resulting boxplot diagrams are provided, allowing for the comparison of value distributions across different samples. The developed and tested hardware-software complex «Smart Ecosystems» enables the identification of times for significant peak noise exposures. The research results contribute to the development of environmental monitoring tools and the formation of a scientifically based approach to managing the acoustic environment of a modern city. Keywords: noise, acoustic analysis, Internet of Things, monitoring, IoT platform. DOI: 10.25791/esip.1.2026.1571 Pp. 48-58.