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Paper Abstract and Keywords
Presentation 2008-01-28 14:00
Improvement of Precision of Compact Finite Difference for Acoustic Simulation
Hideo Tsuru (NAE), Reima Iwatsu (TDU) US2007-91 EA2007-97
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, the finite difference method, a tool for wave acoustic simulations, can be applied to practical analysis. However, the numerical dispersion which makes propagation speed in simulations
change according to the wave length, is a severe problem to maintain high accuracy in the analysis. The numerical error accompanied by the time integration hinders to carry out an accurate simulation. An examination of a compact finite difference scheme which can approximate
differentiation precisely on a comparatively large grid spacing was made.
It was shown that the adjusting the coefficients in the compact finite difference scheme can simulate a wave propagation accurately with a small amount of computation. The improvement method of the time
integration was also discussed. The possibility of improvement of accuracy through a multi-step integration is shown.
Keyword (in Japanese) (See Japanese page) 
(in English) compact finite difference / numerical dispersion / optimization / multi-step integration / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 469, EA2007-97, pp. 13-18, Jan. 2008.
Paper # EA2007-97 
Date of Issue 2008-01-21 (US, 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 US2007-91 EA2007-97

Conference Information
Committee EA US  
Conference Date 2008-01-28 - 2008-01-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Kansai University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To EA 
Conference Code 2008-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of Precision of Compact Finite Difference for Acoustic Simulation 
Sub Title (in English)  
Keyword(1) compact finite difference  
Keyword(2) numerical dispersion  
Keyword(3) optimization  
Keyword(4) multi-step integration  
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1st Author's Name Hideo Tsuru  
1st Author's Affiliation Ｎｉｔｔｏｂｏ Acoustic Engineering (NAE)
2nd Author's Name Reima Iwatsu  
2nd Author's Affiliation Tokyo Denki University (TDU)
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Speaker Author-1 
Date Time 2008-01-28 14:00:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # US2007-91, EA2007-97 
Volume (vol) vol.107 
Number (no) no.467(US), no.469(EA) 
Page pp.13-18 
#Pages 6 
Date of Issue 2008-01-21 (US, EA) 

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