Performance of Green’s function retrieval methods for various sound source distributions: Application to outdoor acoustic propagation

In this work, Green’s function retrieval methods for an outdoor acoustic propagation channel are presented. Green’s function retrieval methods by multidimensional deconvolution and crosscorrelation are compared for different source distributions. Of particular interest is the accuracy of the retrieved Green’s function of an arbitrary sound source with that of an impulsive sound source. Also, the signal-to-noise ratio of both methods will be investigated. To this end, outdoor acoustic experiments are conducted in a clearing and wooded area in southern Maryland. Results will be obtained for various source-receiver ranges up to 400 m.