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

fYear

2015

fDate

19-24 April 2015

Firstpage

305

Lastpage

309

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing (ICASSP), 2015 IEEE International Conference on

Conference_Location

South Brisbane, QLD

Type

conf

DOI

10.1109/ICASSP.2015.7177980

Filename

7177980