| Presentation | 2008-12-05 Directional Sound Radiation System using a Planar Diaphragm Incorporating Multiple Vibrators : Influence of diaphragm shape and vibrator positions toward sound directivity controlling Yoko YAMAKATA, Michiaki KATSUMOTO, Toshiyuki KIMURA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have constructed a sound production system that can control the sound directivity by controlling bending vibration of a large planar diaphragm using multiple vibrators. This paper indicates the selectability of sound radiation directivity by modulating such as the shape and thickness of the diaphragm and the setting position of the vibrators. We simulated the diaphragm vibration using the Finite Element Method (FEM) and the radiated sound simulation using the Boundary Element Method (BEM). Firstly, we confirm the simulation results are approximately coincident with the real stuff behavior by measuring the bending vibration and the radiated sound directivity and comparing these results with the simulation results. Secondly, we indicated that the radiated sound directivity mainly varies continuously with the parameter variation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | directional sound radiation / sound reproduction system / finite element method / boundary element method |
| Paper # | EA2008-112 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2008/11/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Directional Sound Radiation System using a Planar Diaphragm Incorporating Multiple Vibrators : Influence of diaphragm shape and vibrator positions toward sound directivity controlling |
| Sub Title (in English) | |
| Keyword(1) | directional sound radiation |
| Keyword(2) | sound reproduction system |
| Keyword(3) | finite element method |
| Keyword(4) | boundary element method |
| 1st Author's Name | Yoko YAMAKATA |
| 1st Author's Affiliation | National Institute of Information and Communications Technology() |
| 2nd Author's Name | Michiaki KATSUMOTO |
| 2nd Author's Affiliation | National Institute of Information and Communications Technology |
| 3rd Author's Name | Toshiyuki KIMURA |
| 3rd Author's Affiliation | National Institute of Information and Communications Technology |
| Date | 2008-12-05 |
| Paper # | EA2008-112 |
| Volume (vol) | vol.108 |
| Number (no) | 333 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |