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| Presentation | 2018-03-19 13:00 [Poster Presentation] Reproduction of the Roaring Dragon "Nakiryu" Phenomenon in Yakushido Hall by Sound Field Rendering Issei Takenuki, Takuya Kambara, Takao Tsuchiya (Doshisha Univ.), Hiroshi Hasegawa (Utsunomiya Univ.)  EA2017-122 SIP2017-131 SP2017-105 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | It is known in the Yakushido hall in Tochigi prefecture that the roaring dragon "Nakiryu" phenomenon which can be heard by the unique sound like a bell sound occurs because the sounds emitted in the hall are multiply reflected between the ceiling and floor. It is also known that the Nakiryu phenomenon is caused by the beat in the reflected sound due to a slight curvature of the ceiling called "Mukuri". In this study, the Nakiryu phenomenon is numerically reproduced by the sound field rendering which can accurately analyze the three-dimensional sound field including wave property. The relationship between Mukuri shape and beat is numerically examined. In the numerical experiments, the several models with different ceiling shapes are calculated by the sound field rendering. It is found by the numerical experiments that the beat in the impulse response is caused by two reflected waves which have the slightly different turnaround time between the ceiling and floor due to the shape of the ceiling. It is also found that the period of the beat represents the characteristics of the Nakiryu. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | roaring dragon "Nakiryu" phenomenon / sound field rendering / impulse response / beat / Mukuri / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 515, EA2017-122, pp. 121-126, March 2018. | |
| Paper # | EA2017-122 | |
| Date of Issue | 2018-03-12 (EA, SIP, SP) | |
| 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 | EA2017-122 SIP2017-131 SP2017-105 |
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| Conference Information | |
| Committee | SIP EA SP MI |
| Conference Date | 2018-03-19 - 2018-03-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech, Engineering/Electro Acoustics, Signal Processing, and Related Topics [SIP, EA, SP]/ Medical Image Engineering, Analysis, Recognition, etc. [MI] |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2018-03-SIP-EA-SP-MI |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Reproduction of the Roaring Dragon "Nakiryu" Phenomenon in Yakushido Hall by Sound Field Rendering |
| Sub Title (in English) | |
| Keyword(1) | roaring dragon "Nakiryu" phenomenon |
| Keyword(2) | sound field rendering |
| Keyword(3) | impulse response |
| Keyword(4) | beat |
| Keyword(5) | Mukuri |
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| 1st Author's Name | Issei Takenuki |
| 1st Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 2nd Author's Name | Takuya Kambara |
| 2nd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 3rd Author's Name | Takao Tsuchiya |
| 3rd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 4th Author's Name | Hiroshi Hasegawa |
| 4th Author's Affiliation | Utsunomiya University (Utsunomiya Univ.) |
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| Speaker | Author-1 |
| Date Time | 2018-03-19 13:00:00 |
| Presentation Time | 90 minutes |
| Registration for | EA |
| Paper # | EA2017-122, SIP2017-131, SP2017-105 |
| Volume (vol) | vol.117 |
| Number (no) | no.515(EA), no.516(SIP), no.517(SP) |
| Page | pp.121-126 |
| #Pages | 6 |
| Date of Issue | 2018-03-12 (EA, SIP, SP) |
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