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Paper Abstract and Keywords
Presentation 2010-12-10 10:00
Wave front reproduction using the spatial covariance matrices method
Hiroki Hagiwara (Kogakuin Univ.), Yoshinori Takahashi (Tokyo Metro. College of Industrial Tech./Kogakuin Univ.), Kazunori Miyoshi (Kogakuin Univ.) EA2010-97
Abstract (in Japanese) (See Japanese page) 
(in English) This paper describes a sound-field reproduction method called a Co-Variance Method (CVM) that reproduces a spatial covariance matrix of the original sound field without information of sound-source locations. Multi-channels of reproduced sound in a listening area were made from the recorded signals in the original field according to the adoptively optimized process where the quasi-Newton method is utilized in order to get the solution. Numerical simulation results confirmed that the method works well in principle, and consequently reconstructed wavefronts are similar to the original ones. Relationship between the number of microphones or loudspeakers and reproduction errors are investigated. It is shown that the phase error diminishes as the number of pairs for microphones and loudspeakers increases more than that of positions set for the covariance analysis. Estimated source location using the minimum phase error in the reproduced field is approximately reproduced as the original source location.
Keyword (in Japanese) (See Japanese page) 
(in English) Sound field control / Sound field reproduction / Multi-channel acoustics / / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 331, EA2010-97, pp. 1-6, Dec. 2010.
Paper # EA2010-97 
Date of Issue 2010-12-03 (EA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
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)
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Conference Information
Committee EA  
Conference Date 2010-12-10 - 2010-12-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ. of Tsukuba 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General Topics 
Paper Information
Registration To EA 
Conference Code 2010-12-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Wave front reproduction using the spatial covariance matrices method 
Sub Title (in English)  
Keyword(1) Sound field control  
Keyword(2) Sound field reproduction  
Keyword(3) Multi-channel acoustics  
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1st Author's Name Hiroki Hagiwara  
1st Author's Affiliation Kogakuin University (Kogakuin Univ.)
2nd Author's Name Yoshinori Takahashi  
2nd Author's Affiliation Tokyo Metropolitan College of Industrial Technology/Kogakuin University (Tokyo Metro. College of Industrial Tech./Kogakuin Univ.)
3rd Author's Name Kazunori Miyoshi  
3rd Author's Affiliation Kogakuin University (Kogakuin Univ.)
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Date Time 2010-12-10 10:00:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2010-97 
Volume (vol) vol.110 
Number (no) no.331 
Page pp.1-6 
#Pages
Date of Issue 2010-12-03 (EA) 


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