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Paper Abstract and Keywords
Presentation 2010-10-21 17:45
A study on the continuity of the moving sound image by Wave Field Synthesis.
Shinji Uranaka, Haruhide Hokari, Shoji Shimada (Nagaoka Univ. of Tech.) EA2010-67
Abstract (in Japanese) (See Japanese page) 
(in English) This report discusses the moving sound image continuity yielded by a real sound source
(LSM:Loudspeaker Switching Method) and a virtual sound source (WFS:Wave Field Synthesis) using a Loud-
speaker array with linear arrangement. First, listening tests to assess continuity are performed in two listening
locations: the center and the right of the Loudspeaker array; separation distance is 0.72m. The distance between
Loudspeaker array and the listening locations is 1.5m. Although the percentage of answer rates was 80% or more at
the center location, it decreased 20%～60% at the right location under the condition that the Loudspeaker Interval
of LSM was 0.12m. Next, the time variations of the Sound Pressure Level, Interaural Time Difference(IaTD) and
lnteraural Level Difference(IaLD) of the moving sound image were proposed as key physical factors in assessing
the continuity. The standard deviation and the approximately quadratic curve as yielded by the minimum mean
square method are calculated from measured values. It is shown that the real source yielded a moving sound that
demonstrated non-monotonic variation while the virtual source yielded a moving sound with monotonic variation
(interval of 0.02m). Additionally, the standard deviation of the moving sound of the real source with an interval of
0.12m at the center listening location is similar to that of the virtual source with an interval of 0.02m at the right
location. This clearly indicates that the continuity of moving sound can be well improved by using WFS.
Keyword (in Japanese) (See Japanese page) 
(in English) Moving sound image / Interaural Time Difference / Interaural Level Difference / Wave Field Synthesis / Continuity / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 239, EA2010-67, pp. 55-60, Oct. 2010.
Paper # EA2010-67 
Date of Issue 2010-10-14 (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)
Download PDF EA2010-67

Conference Information
Committee EA  
Conference Date 2010-10-21 - 2010-10-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Kanazawa-city Omi-cho Koryu Plaza 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General Topics 
Paper Information
Registration To EA 
Conference Code 2010-10-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on the continuity of the moving sound image by Wave Field Synthesis. 
Sub Title (in English)  
Keyword(1) Moving sound image  
Keyword(2) Interaural Time Difference  
Keyword(3) Interaural Level Difference  
Keyword(4) Wave Field Synthesis  
Keyword(5) Continuity  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Shinji Uranaka  
1st Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
2nd Author's Name Haruhide Hokari  
2nd Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
3rd Author's Name Shoji Shimada  
3rd Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
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Speaker Author-1 
Date Time 2010-10-21 17:45:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2010-67 
Volume (vol) vol.110 
Number (no) no.239 
Page pp.55-60 
#Pages 6 
Date of Issue 2010-10-14 (EA) 

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