Design of Steerable Linear Differential Microphone Arrays With Omnidirectional and Bidirectional Sensors

This paper is dedicated to the design of fully steerable linear differential microphone arrays (LDMAs). We analyze the steerable ideal spatial responses and explain why conventional LDMAs consisting of only omnidirectional microphones have limited steering ability. In order to circumvent this limita...

Full description

Saved in:
Bibliographic Details
Published in:IEEE signal processing letters 2023-01, Vol.30, p.1-5
Main Authors: Luo, Xueqin, Jin, Jilu, Huang, Gongping, Chen, Jingdong, Benesty, Jacob
Format: Article
Language:English
Subjects:
Array signal processing
Arrays
beam steering
Beamforming
differential beamforming
Dipoles
Directivity
directivity factor
Image color analysis
Jacobian matrices
Linear microphone arrays
Microphone arrays
Microphones
Sensor arrays
Sensors
Series expansion
Steering
White noise
white noise gain
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper is dedicated to the design of fully steerable linear differential microphone arrays (LDMAs). We analyze the steerable ideal spatial responses and explain why conventional LDMAs consisting of only omnidirectional microphones have limited steering ability. In order to circumvent this limitation, we suggest to use both omnidirectional and bidirectional (with a dipole shaped directivity pattern) microphones. We discuss the minimum numbers of omnidirectional and bidirectional sensors required for achieving steerable spatial responses and present a method to design fully steerable differential beamformers with LDMAs through the Jacobi-Anger series expansion. Simulations validate the presented technique and the steering flexibility of the designed LDMAs.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2023.3267969