| Presentation | 2018-03-19 [Poster Presentation] Reproduction of the Roaring Dragon "Nakiryu" Phenomenon in Yakushido Hall by Sound Field Rendering Issei Takenuki, Takuya Kambara, Takao Tsuchiya, Hiroshi Hasegawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | roaring dragon "Nakiryu" phenomenon / sound field rendering / impulse response / beat / Mukuri |
| Paper # | EA2017-122,SIP2017-131,SP2017-105 |
| Date of Issue | 2018-03-12 (EA, SIP, SP) |
| Conference Information | |
| Committee | SIP / EA / SP / MI |
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| Conference Date | 2018/3/19(2days) |
| 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] |
| Chair | Masahiro Okuda(Univ. of Kitakyushu) / Suehiro Shimauchi(NTT) / Yoichi Yamashita(Ritsumeikan Univ.) / Kensaku Mori(Nagoya Univ.) |
| Vice Chair | Shogo Muramatsu(Niigata Univ.) / Naoyuki Aikawa(TUS) / Mitsunori Mizumachi(Kyutech) / Hiroki Mori(Utsunomiya Univ.) / Yoshiki Kawata(Tokushima Univ.) / Yuichi Kimura(Kinki Univ.) |
| Secretary | Shogo Muramatsu(Chiba Inst. of Tech.) / Naoyuki Aikawa(Takushoku Univ.) / Mitsunori Mizumachi(Akita Pref. Univ.) / Hiroki Mori(Shizuoka Inst. of Science and Tech.) / Yoshiki Kawata(Shizuoka Univ.) / Yuichi Kimura(Meijo Univ.) |
| Assistant | Masayoshi Nakamoto(Hiroshima Univ.ひろ) / TREVINO Jorge(Tohoku Univ.) / Nobutaka Ito(NTT) / Kei Hashimoto(Nagoya Inst. of Tech.) / Satoshi Kobashikawa(NTT) / Ryo Haraguchi(Univ. of Hyogo) / Yasushi Hirano(Yamaguchi Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Signal Processing / Technical Committee on Engineering Acoustics / Technical Committee on Speech / Technical Committee on Medical Imaging |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] 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 |
| 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.) |
| Date | 2018-03-19 |
| Paper # | EA2017-122,SIP2017-131,SP2017-105 |
| Volume (vol) | vol.117 |
| Number (no) | EA-515,SIP-516,SP-517 |
| Page | pp.pp.121-126(EA), pp.121-126(SIP), pp.121-126(SP), |
| #Pages | 6 |
| Date of Issue | 2018-03-12 (EA, SIP, SP) |