Urban Traffic Noise Analysis Using UAV-Based Array of Microphones

Abstract

(1) Background: Transition to smart cities involves many actions in different fields of activity, such as economy, environment, energy, government, education, living and health, safety and security, and mobility. Environment and mobility are very important in terms of ensuring a good living in urban areas. Considering such arguments, this paper proposes monitoring and mapping of a 3D traffic-generated urban noise emissions using a simple, UAV-based, and low-cost solution. (2) Methods: The collection of relevant sound recordings is performed via a UAV-borne set of microphones, designed in a specific array configuration. Post-measurement data processing is performed to filter unwanted sound and vibrations produced by the UAV rotors. Collected noise information is location- and altitude-labeled to ensure a relevant 3D profile of data. (3) Results: Field measurements of sound levels in different directions and altitudes are presented in the paperwork. (4) Conclusions: The solution of employing UAV for environmental noise mapping results in being minimally invasive, low-cost, and effective in terms of rapidly producing environmental noise pollution maps for reports and future improvements in road infrastructure.

UAV Implementations in Urban Planning and Related Sectors of Rapidly Developing Nations: A Review and Future Perspectives for Malaysia

“…Furthermore, they measure noise levels in urban areas, aiding in understanding and mitigating the negative impacts of noise pollution on public health. The authors of [139] propose a low-cost UAV-based solution utilizing a microphone array to monitor urban noise emissions, demonstrating its effectiveness, cost-efficiency, and minimal invasiveness. The approach enables the rapid creation of noise pollution maps to enhance road infrastructure.…”