Enhanced 3D (three dimensional) acoustic scene analysis based on sound arrival direction for automatic airport noise monitoring.

To deepen our understanding of the spatial and temporal distribution of various sound sources of environmental noise, which is observed by unattended aircraft noise monitors, we have been developing a method of acoustic scene analysis based on information on the 3D sound arrival direction. In the congress of INTERNOISE 2021 last year, we reported the basic idea of this method and some examples of the analysis. The method of acoustic scene analysis, named static mode and dynamic mode, is based on the information of the direction of arrival and sound pressure level of the sound in three dimensions from time to time. Since the moving path was limited to the one satisfying the specified preconditions, there were restrictions on the sound sources moving in the sky to be applied. Therefore, we decided to improve the versatility of the dynamic mode acoustic scene analysis method by adding a sensor that observes the direction of sound arrival. In this paper, we report the results of our experiments and analysis.