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Paper Abstract and Keywords
Presentation 2017-01-31 13:30
Study on the basic properties of a micro-spaced microphone array
Genya Shimizu, Kenji Ozawa, Masaaki Ito, Masanori Morise (Univ. Yamanashi), Shuichi Sakamoto (Tohoku Univ.) EMM2016-85
Abstract (in Japanese) (See Japanese page) 
(in English) Microphone arrays have been used to separate sound sources to improve speech recognition in a noisy environment. We propose a {it micro-spaced microphone array} in which image signal processing is used to achieve highly accurate sound source separation. A number of microphones are arranged on a straight line, and temporal sequences of the sound pressures obtained from the microphones are converted into sequences of luminance. These are arranged in parallel in an image, which is referred to as a spatio-temporal sound pressure distribution image.
The spatial spectrum of this image is obtained using a two-dimensional fast Fourier transform algorithm. In this spectrum, the angle of a line through the center denotes the arrival direction of sound, and the abscissa indicates its frequency. By extracting a line from the spectrum, the sound source can be separated. In this report the effects of parameters of the proposed array on the accuracy were observed by a computational experiment.
Keyword (in Japanese) (See Japanese page) 
(in English) Micro-spaced microphone array / Spatio-temporal sound pressure distribution image / Image signal processing / two-dimensional FFT / Sound source separation / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 449, EMM2016-85, pp. 67-72, Jan. 2017.
Paper # EMM2016-85 
Date of Issue 2017-01-23 (EMM) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EMM  
Conference Date 2017-01-30 - 2017-01-31 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University (Miyagi) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Sense of Presence, Universal Media, Digital Entertainment, etc. 
Paper Information
Registration To EMM 
Conference Code 2017-01-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on the basic properties of a micro-spaced microphone array 
Sub Title (in English)  
Keyword(1) Micro-spaced microphone array  
Keyword(2) Spatio-temporal sound pressure distribution image  
Keyword(3) Image signal processing  
Keyword(4) two-dimensional FFT  
Keyword(5) Sound source separation  
1st Author's Name Genya Shimizu  
1st Author's Affiliation University of Yamanashi (Univ. Yamanashi)
2nd Author's Name Kenji Ozawa  
2nd Author's Affiliation University of Yamanashi (Univ. Yamanashi)
3rd Author's Name Masaaki Ito  
3rd Author's Affiliation University of Yamanashi (Univ. Yamanashi)
4th Author's Name Masanori Morise  
4th Author's Affiliation University of Yamanashi (Univ. Yamanashi)
5th Author's Name Shuichi Sakamoto  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-2 
Date Time 2017-01-31 13:30:00 
Presentation Time 30 minutes 
Registration for EMM 
Paper # EMM2016-85 
Volume (vol) vol.116 
Number (no) no.449 
Page pp.67-72 
Date of Issue 2017-01-23 (EMM) 

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