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Paper Abstract and Keywords
Presentation 2020-08-26 14:55
Analysis of fluctuations of sound reflected on sea surface using the FDTD method
Tomoya Tsukui (Tokyo Tech), Shinnosuke Hirata (Chiba Univ), Hiroyuki Hachiya (Tokyo Tech) US2020-24
Abstract (in Japanese) (See Japanese page) 
(in English) Many kinds of hydro acoustic devices are used in the field of ocean development of resources and observations. These devices transmit and receive sound under the sea, so it is important to evaluate characteristics of sound reflection on sea surface. A completely reflection model on sea surface without waves is often used, but amplitude and phase of reflected sound wave fluctuates because of the changing sea surface with waves. In this research, using acoustic simulation with the FDTD method, we evaluated variability characteristics of reflected sound waves on sea surface generated by Bretshneider-Mitsuyasu spectra observed in deep offshore coast of Japan. From the simulation results, we quantitatively clarified the influence of the sea surface wavelength on the amplitude and phase fluctuations or reflected sound waves.
Keyword (in Japanese) (See Japanese page) 
(in English) Sea surface / Sound reflection / FDTD method / Variability / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 139, US2020-24, pp. 21-26, Aug. 2020.
Paper # US2020-24 
Date of Issue 2020-08-19 (US) 
ISSN 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 US2020-24

Conference Information
Committee US  
Conference Date 2020-08-26 - 2020-08-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Underwater acoustics, etc. 
Paper Information
Registration To US 
Conference Code 2020-08-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of fluctuations of sound reflected on sea surface using the FDTD method 
Sub Title (in English)  
Keyword(1) Sea surface  
Keyword(2) Sound reflection  
Keyword(3) FDTD method  
Keyword(4) Variability  
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1st Author's Name Tomoya Tsukui  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Shinnosuke Hirata  
2nd Author's Affiliation Chiba University (Chiba Univ)
3rd Author's Name Hiroyuki Hachiya  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2020-08-26 14:55:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2020-24 
Volume (vol) vol.120 
Number (no) no.139 
Page pp.21-26 
#Pages 6 
Date of Issue 2020-08-19 (US) 

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