| Presentation | 2001/1/18 Eigenfrequency and eigenmode analysis for semi-standium 2-D fields. Yoh-ichi FUJISAKA, Yoshinori TAKAHASHI, Mikio TOHYAMA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Chaotic properties are hidden in a sound ray propagated in a sound space surrounded by irregularly shaped boundaries. A stadium type of boundary is an example of the type of condision where chaotic properties are hidden. This type of chaotoc phenomenon was pointed out by Berry who proposed a new research area named quantum chaology. The main purpose of quantum chaology is to find a new corresponding principle between the classecal and quantum systems by studying the "fingerprints of chaos"that remain in linear-wave fields. The theoretical study of the fingerprints of waves, which are termed leftover in linear-wave theory and are caused by the emergence of chaotic behaavior in sound ray propagation, is also important for sound-field analysis and sound space design for irregularly shaped boundary conditions. Eigenfrequency and modal patterns are significant topics in the study of fingerprints. This paper numerically analyzed eigenfrequency statistics and modal patterns in semi-stadium-type 2-D fields, as examples of boundaries where chaotic properties are hidden. The authors made clear that the skewness and the symmetry is decreased as the shape shifts in the irregular system. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | chaos / room acoustics / stadium / eigenfrequency / eigenmode |
| Paper # | US2000-84,EA2000-91 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2001/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Eigenfrequency and eigenmode analysis for semi-standium 2-D fields. |
| Sub Title (in English) | |
| Keyword(1) | chaos |
| Keyword(2) | room acoustics |
| Keyword(3) | stadium |
| Keyword(4) | eigenfrequency |
| Keyword(5) | eigenmode |
| 1st Author's Name | Yoh-ichi FUJISAKA |
| 1st Author's Affiliation | Kogakuin University() |
| 2nd Author's Name | Yoshinori TAKAHASHI |
| 2nd Author's Affiliation | Kogakuin University |
| 3rd Author's Name | Mikio TOHYAMA |
| 3rd Author's Affiliation | Kogakuin University |
| Date | 2001/1/18 |
| Paper # | US2000-84,EA2000-91 |
| Volume (vol) | vol.100 |
| Number (no) | 578 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |