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Paper Abstract and Keywords
Presentation 2023-11-23 13:00
[Poster Presentation] Investigation on improvement of beamforming low-frequency characteristics by estimation of virtual microphone array signal
Ryosuke Oyashiki, Kanji Watanabe, Masayuki Nishiguchi, Koji Abe (Akita Prefectural Univ.) EA2023-32 EMM2023-63
Abstract (in Japanese) (See Japanese page) 
(in English) Our goal is to realize a system that reproduces a certain sound field in a different field.We have proposed a system using beamforming (BF) and demonstrated its effectiveness through simulations.However, the current configuration requires multiple microphone arrays because of the frequency dependence of BF.This leads to increase the required resources and reduces the portability of the system, which is a major issue for operating the system in a real environment.In this report, we propose a method to estimate the signals observed by a virtual array from signals observed by a real array. The microphone interval of a virtual array is wider than that of the real array. The estimated signals are applied to BF. The objective evaluation results show that the proposed method can improve the directivity of the BF in the low-frequency band, where directivity could not be obtained by conventional method, in both simulation and real environment.
Keyword (in Japanese) (See Japanese page) 
(in English) Linear microphone array / Virtual array / Beamforming / Delay-and-Sum / Sound field reproduction / Least-squares method / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 278, EA2023-32, pp. 23-30, Nov. 2023.
Paper # EA2023-32 
Date of Issue 2023-11-16 (EA, EMM) 
ISSN Online edition: ISSN 2432-6380
Copyright
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reproduction		 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)
Download PDF EA2023-32 EMM2023-63

Conference Information
Committee EMM EA ASJ-H  
Conference Date 2023-11-23 - 2023-11-24 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Beginners Session] Engineering/Electro Acoustics, Content Processing, Digital Watermarking, Psychological and Physiological Acoustics, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2023-11-EMM-EA-H 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation on improvement of beamforming low-frequency characteristics by estimation of virtual microphone array signal 
Sub Title (in English)  
Keyword(1) Linear microphone array  
Keyword(2) Virtual array  
Keyword(3) Beamforming  
Keyword(4) Delay-and-Sum  
Keyword(5) Sound field reproduction  
Keyword(6) Least-squares method  
Keyword(7)  
Keyword(8)  
1st Author's Name Ryosuke Oyashiki  
1st Author's Affiliation Akita Prefectural University (Akita Prefectural Univ.)
2nd Author's Name Kanji Watanabe  
2nd Author's Affiliation Akita Prefectural University (Akita Prefectural Univ.)
3rd Author's Name Masayuki Nishiguchi  
3rd Author's Affiliation Akita Prefectural University (Akita Prefectural Univ.)
4th Author's Name Koji Abe  
4th Author's Affiliation Akita Prefectural University (Akita Prefectural Univ.)
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Speaker Author-1 
Date Time 2023-11-23 13:00:00 
Presentation Time 150 minutes 
Registration for EA 
Paper # EA2023-32, EMM2023-63 
Volume (vol) vol.123 
Number (no) no.278(EA), no.279(EMM) 
Page pp.23-30 
#Pages 8 
Date of Issue 2023-11-16 (EA, EMM) 

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