Sound field decomposition using spherical microphone arrays

Spherical microphone arrays offer a number of attractive properties such as direction-independent acoustic behavior and ability to reconstruct the sound eld in the vicinity of the array. Such ability is necessary in applications such as ambisonics and recreating auditory environment over headphones. We compare the performance of two scene reconstruction algorithms – one based on least-squares tting the observed potentials and another based on computing the far- eld signature function directly from the microphone measurements. A number of features important for the design and operation of spherical microphone arrays in real applications are revealed. Results indicate that it is possible to reconstruct the sound scene up to order p with p2 microphones.

• Type: Conference
• Year: 2008
• Where: ICASSP
• Authors: Dmitry N. Zotkin, Ramani Duraiswami, Nail A. Gumerov
• Keywords: Direction-independent Acoustic Behavior, Eld Signature Function, ICASSP 2008, Signal Processing, Spherical Microphone Arrays