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

Xueqin Luo; Jilu Jin; Gongping Huang; Jingdong Chen; Jacob Benesty

doi:10.1109/LSP.2023.3267969

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

Xueqin Luo, Jilu Jin, Gongping Huang, Jingdong Chen, Jacob Benesty

School of Marine Science and Technology

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

This letter 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.

Original language	English
Pages (from-to)	463-467
Number of pages	5
Journal	IEEE Signal Processing Letters
Volume	30
DOIs	https://doi.org/10.1109/LSP.2023.3267969
State	Published - 2023

Keywords

beam steering
differential beamforming
directivity factor
Linear microphone arrays
white noise gain

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10.1109/LSP.2023.3267969

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title = "Design of Steerable Linear Differential Microphone Arrays With Omnidirectional and Bidirectional Sensors",

abstract = "This letter 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.",

keywords = "beam steering, differential beamforming, directivity factor, Linear microphone arrays, white noise gain",

author = "Xueqin Luo and Jilu Jin and Gongping Huang and Jingdong Chen and Jacob Benesty",

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doi = "10.1109/LSP.2023.3267969",

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AU - Luo, Xueqin

AU - Jin, Jilu

AU - Huang, Gongping

AU - Chen, Jingdong

AU - Benesty, Jacob

PY - 2023

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AB - This letter 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.

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KW - differential beamforming

KW - directivity factor

KW - Linear microphone arrays

KW - white noise gain

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SP - 463

EP - 467

JO - IEEE Signal Processing Letters

JF - IEEE Signal Processing Letters

ER -

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

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Keywords

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