Title :
On directivity factor of the first-order steerable differential microphone array
Author :
Xiaoguang Wu ; Huawei Chen
Author_Institution :
Coll. of Electron. & Inf. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
Directivity factor (DF) is a fundamental performance measure of microphone arrays. This paper studies the DF of the first-order steerable differential array (FOSDA) whose response is constructed by a linear combination of monopole and two orthogonal dipoles using a four-element square array. The DF of the ideal FOSDA and the DFs of the FOSDA with microphone gain/phase errors are derived, all in closed forms. Based on the theoretical analysis, several findings regarding the properties of the DF of the FOSDA are obtained.
Keywords :
acoustic variables measurement; microphone arrays; FOSDA; directivity factor; first order steerable differential microphone array; four element square array; microphone array fundamental performance measure; microphone gain errors; microphone phase errors; monopole-orthogonal dipole linear combination; Additives; Arrays; Communications technology; Microphones; Signal processing; Speech; System-on-chip; Differential microphone array; directivity factor; superdirective beamforming;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2015 IEEE International Conference on
Conference_Location :
South Brisbane, QLD
DOI :
10.1109/ICASSP.2015.7177980
