Microphone Array Method for Determining Noise Angular Energy Distribution on Building Envelopes

Miodrag Stanojevic, Miloš Bjelic, Dragana Šumarac Pavlovic, Miomir Mijic, Tatjana Miljkovic
2019 Proceedings of the ICA congress  
A method is proposed for determining traffic noise angular energy distribution on building envelopes using the microphone array as a source localization tool. Measurement procedure is presented with the results obtained by a nonuniform planar array developed for this purpose with microphone positions optimized for traffic noise measurements. The results are obtained in one characteristic urban configuration -a non-canyon street. Results are commented and their implications on the in-situ sound
more » ... the in-situ sound reduction index of the façade element are explained. The algorithms used for sound source localization are CB in the frequency domain, along with deconvolution algorithms DAMAS2 and CLEAN-SC, and their performance is compared. The paper addresses the problem of the computational complexity of the algorithms which results in long execution times and inhibits measurements on a larger scale. A method for algorithm optimization is presented that includes the analysis of key characteristic events instead of an overall noise recording. The sensitivity of output results on varying event recordings is analyzed. The goal is to create a time efficient measurement procedure which would enable the acquisition of a larger data set covering various urban terrain configurations.
doi:10.18154/rwth-conv-239298 fatcat:zpt6jaqglrbktbdqmwyqxu4uli