Acoustic center and orientation analysis of sound-radiation recorded with a surrounding spherical microphone array


Daniel Deboy and Franz Zotter


Sound sources and musical instruments are assumed to posess an acoustic center from which sound radiates and a directivity which describes the dependency of the sound radiation on the direction. Consequently, it should be possible to assign a center and an orientation to a source by the sound it radiates. Surrounding spherical microphone arrays have been built to identify the entire sound-radiation of a source simultaneously at many directions. However, there are no established algorithms for extracting the acoustic center and orientation of sound sources from the spherical microphone arrays data. This paper considers suitable acoustic center and orientation analysis algorithms and shows some practical case studies.

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