A GENERALIZED DESIGN METHOD FOR DIRECTIVITY PATTERNS OF SPHERICAL MICROPHONE ARRAYS

2011-05-27
De Sena, Enzo
Hacıhabiboğlu, Hüseyin
Cvetkovic, Zoran
Spherical microphone arrays provide a flexible solution to obtaining higher-order directivity patterns, which are useful in audio recording and reproduction. A general systematic approach to the design of directivity patterns for spherical microphone arrays is introduced in this paper. The directivity patterns are obtained by optimizing a cost function which is a convex combination of a front-back energy ratio and a smoothness term. Most of the standard directivity patterns - i.e. omnidirectional, cardioid, subcardioid, hypercardioid and supercardioid - are particular solutions of this optimization problem with specific values of two free parameters: the angle of the frontal sector, and the convex combination factor. By varying these two parameters, more general solutions of practical use are obtained.
Citation Formats
E. De Sena, H. Hacıhabiboğlu, and Z. Cvetkovic, “A GENERALIZED DESIGN METHOD FOR DIRECTIVITY PATTERNS OF SPHERICAL MICROPHONE ARRAYS,” presented at the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Prague, CZECH REPUBLIC, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55539.