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Detecting Anomalous Noise Events on a Low-Capacity Acoustic Sensor in Dynamic Road Traffic Noise Mapping
Rosa Ma Alsina-Pages * , Joan Claudi Socoró, Francesc Alías
1  GTM–Grup de Recerca en Tecnologies Mèdia, La Salle – Universitat Ramon Llull. c/Quatre Camins, 30, 08022 Barcelona, Spain


One of the main aspects affecting the life of people living in urban and suburban areas is their continued exposure to high road traffic noise (RTN) levels, traditionally measured by specialists working on the field. Nowadays, the deployment of Wireless Acoustic Sensor Networks (WASN) has allowed automatic noise mapping in Smart Cities. In order to obtain a reliable picture of the RTN levels affecting citizens, those anomalous noise events (ANE) unrelated to road traffic should be removed from the noise map computation. For this purpose, this paper introduces an Anomalous Noise Event Detector (ANED) designed to differentiate in real-time between RTN and ANE at every 1 second, using an algorithm running at a low-capacity $\mu$controller-based acoustic sensor developed within the DYNAMAP project. The low-cap ANED follows a binary audio event detection approach to discriminate between ANE and RTN. It is based on the computing of spectral differences of the input acoustic data in order to fit the computational capacity of the considered low-cap sensors. The experiments considering real-life acoustic data show the feasibility of the proposal as a means to complement the results obtained by the ANED developed for the high-cap acoustic sensors of the WASN.

Keywords: noise, smart city, low capacity, acoustic sensor, anomalous event
Comments on this paper
Rosa Ma Alsina-Pagès
Low Capacity Sensors for a WASN to monitor Road Traffic Noise
Dear Colleagues,

Thanks for reading our work. If you are interested in our proposal, we recommend to read our paper about ANED for high capacity sensors:, and visit the website of the DYNAMAP project:

Thanks for your time!