The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Matrizes de microfones diferenciais têm sido amplamente utilizadas em sistemas de comunicação mãos-livres devido aos seus padrões de feixe invariantes em frequência, altos fatores de diretividade e pequenas aberturas. Considerando a posição da fonte acústica sempre se movendo dentro de uma certa faixa em aplicações reais, esta carta propõe uma abordagem para construir o padrão de feixe diferencial de primeira ordem direcionável usando quatro microfones omnidirecionais dispostos em uma geometria circular não ortogonal. A análise teórica e os resultados da simulação mostram que o padrão de feixe construído por meio deste método atinge o mesmo fator de direção (DF) que os DMAs tradicionais e maior ganho de ruído branco (WNG) dentro de uma determinada faixa angular. Os resultados da simulação também mostram que o método proposto se aplica ao processamento de sinais de voz. Em experimentos, mostramos a eficácia e a pequena quantidade computacional do método proposto.
Qiang YU
Nanjing Tech University
Xiaoguang WU
Nanjing Tech University
Yaping BAO
Nanjing Tech University
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Qiang YU, Xiaoguang WU, Yaping BAO, "Design and Analysis of First-Order Steerable Nonorthogonal Differential Microphone Arrays" in IEICE TRANSACTIONS on Fundamentals,
vol. E101-A, no. 10, pp. 1687-1692, October 2018, doi: 10.1587/transfun.E101.A.1687.
Abstract: Differential microphone arrays have been widely used in hands-free communication systems because of their frequency-invariant beampatterns, high directivity factors and small apertures. Considering the position of acoustic source always moving within a certain range in real application, this letter proposes an approach to construct the steerable first-order differential beampattern by using four omnidirectional microphones arranged in a non-orthogonal circular geometry. The theoretical analysis and simulation results show beampattern constructed via this method achieves the same direction factor (DF) as traditional DMAs and higher white noise gain (WNG) within a certain angular range. The simulation results also show the proposed method applies to processing speech signal. In experiments, we show the effectiveness and small computation amount of the proposed method.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E101.A.1687/_p
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@ARTICLE{e101-a_10_1687,
author={Qiang YU, Xiaoguang WU, Yaping BAO, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Design and Analysis of First-Order Steerable Nonorthogonal Differential Microphone Arrays},
year={2018},
volume={E101-A},
number={10},
pages={1687-1692},
abstract={Differential microphone arrays have been widely used in hands-free communication systems because of their frequency-invariant beampatterns, high directivity factors and small apertures. Considering the position of acoustic source always moving within a certain range in real application, this letter proposes an approach to construct the steerable first-order differential beampattern by using four omnidirectional microphones arranged in a non-orthogonal circular geometry. The theoretical analysis and simulation results show beampattern constructed via this method achieves the same direction factor (DF) as traditional DMAs and higher white noise gain (WNG) within a certain angular range. The simulation results also show the proposed method applies to processing speech signal. In experiments, we show the effectiveness and small computation amount of the proposed method.},
keywords={},
doi={10.1587/transfun.E101.A.1687},
ISSN={1745-1337},
month={October},}
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TY - JOUR
TI - Design and Analysis of First-Order Steerable Nonorthogonal Differential Microphone Arrays
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1687
EP - 1692
AU - Qiang YU
AU - Xiaoguang WU
AU - Yaping BAO
PY - 2018
DO - 10.1587/transfun.E101.A.1687
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E101-A
IS - 10
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - October 2018
AB - Differential microphone arrays have been widely used in hands-free communication systems because of their frequency-invariant beampatterns, high directivity factors and small apertures. Considering the position of acoustic source always moving within a certain range in real application, this letter proposes an approach to construct the steerable first-order differential beampattern by using four omnidirectional microphones arranged in a non-orthogonal circular geometry. The theoretical analysis and simulation results show beampattern constructed via this method achieves the same direction factor (DF) as traditional DMAs and higher white noise gain (WNG) within a certain angular range. The simulation results also show the proposed method applies to processing speech signal. In experiments, we show the effectiveness and small computation amount of the proposed method.
ER -