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Paper Abstract and Keywords
Presentation 2009-06-26 17:00
The design of a directional sound source for numerical simulation based on wave acoustics
Toshimasa Suziki (Sophia Univ.), Hirofumi Nakajima, Kazuhiro Nakadai (Honda Research Institute Japan Co., Ltd.), Takayuki Arai (Sophia Univ.), Yuji Hasegawa (Honda Research Institute Japan Co., Ltd.) EA2009-36
Abstract (in Japanese) (See Japanese page) 
(in English) Thanks to improvements in computer performance, numerical simulation
based on wave acoustics works in practical time with off-the-shelf
computers. Such a numerical simulation method accurately estimates a
sound field when it is a simple and simulated environment like a free
sound field. However, this method has difficulties in simulating a
real-world acoustic environment. One of issues for real-world
simulation is to deal with a sound directivity. Thus, most numerical
simulators assume a point sound source to avoid this issue. Indeed,
several studies to cope with a sound directivity have been reported,
but, the accuracy and practical are insufficient for real-world
simulation, because an accurate sound propagation model is necessary
to deal with a sound directivity. We use a compact finite difference
method based on sound field digitization which has an accurate sound
propagation model. However, this method also has a problem, that is,
two points are simulated differently even when they are located with
the same distance from the sound source due to the difference in the
effect of their numerical variances. In this paper we, first, confirm
the performance of our method by using an omni-directional point
source in a free sound field. After that, we show that our method is
able to simulate a directional sound source accurately using a
combination of a simple loudspeaker and a point source models.
Keyword (in Japanese) (See Japanese page) 
(in English) numerical simulation / wave acoustics / compact finite difference / directivity / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 100, EA2009-36, pp. 109-114, June 2009.
Paper # EA2009-36 
Date of Issue 2009-06-18 (EA) 
ISSN Print edition: ISSN 0913-5685    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)
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Conference Information
Committee EA  
Conference Date 2009-06-25 - 2009-06-26 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EA 
Conference Code 2009-06-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The design of a directional sound source for numerical simulation based on wave acoustics 
Sub Title (in English)  
Keyword(1) numerical simulation  
Keyword(2) wave acoustics  
Keyword(3) compact finite difference  
Keyword(4) directivity  
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1st Author's Name Toshimasa Suziki  
1st Author's Affiliation Sophia University (Sophia Univ.)
2nd Author's Name Hirofumi Nakajima  
2nd Author's Affiliation Honda Research Institute Japan Co., Ltd. (Honda Research Institute Japan Co., Ltd.)
3rd Author's Name Kazuhiro Nakadai  
3rd Author's Affiliation Honda Research Institute Japan Co., Ltd. (Honda Research Institute Japan Co., Ltd.)
4th Author's Name Takayuki Arai  
4th Author's Affiliation Sophia University (Sophia Univ.)
5th Author's Name Yuji Hasegawa  
5th Author's Affiliation Honda Research Institute Japan Co., Ltd. (Honda Research Institute Japan Co., Ltd.)
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Speaker Author-1 
Date Time 2009-06-26 17:00:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2009-36 
Volume (vol) vol.109 
Number (no) no.100 
Page pp.109-114 
#Pages
Date of Issue 2009-06-18 (EA) 


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