1. A processor-implemented method for sound characterization, the method comprising: deriving, via a processor, time-frequency transform of each of a plurality of sound signals from one or more sources, wherein the sound signals are detected by a plurality of sensing devices; detecting via the processor, one or more single-source time-frequency analysis zones based at least on a correlation between the time-frequency transform signals from a pair of sensing devices; estimating, via the processor, at least one direction of arrival for each source in the detected single source analysis zones; creating, via the processor, a histogram of the estimated directions of arrival; and generating, via the processor, an estimate of a number of the sound sources and corresponding directions of arrival based at least on the histogram.