| Presentation | 2013-11-15 Methods for analyzing vibration characteristics of Distributed Mode Loudspeakers Kohei TAKAYANAGI, Toshiya SAMEJIMA, Kazuhiko KAWAHARA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The Distributed Mode Loudspeaker(DML) is one of panel speakers. The DML provides acoustic radiation by bending vibration of its plate generated by the applied force of its exciter. The finite element method(FEM) for plate bending problems is employed to analyze the bending vibration of the plate of the DML. In order to improve accuracy of prediction of measured results, alternative supported conditions of the plate of the DML are proposed: One is the boundary condition expressed by the mechanical impedance including one translational spring and two rotational springs; The other is the boundary supported by 3-dimensional elastic bodies. Moreover, the internal sound field in the enclosure of the DML is regarded as a spatially uniform sound field, and then we construct FEM-based numerical methods for calculating the bending vibration of the plate of the DML with its internal sound field as a vibro-acoustic system. We show that analysis results by the consequent numerical methods are approximate to measured results of a real DML. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DML / Finite element method for plate bending problems / Finite element method for 3-dimensional solid problems / Internal sound field |
| Paper # | EA2013-85,EMM2013-85 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2013/11/7(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) | Methods for analyzing vibration characteristics of Distributed Mode Loudspeakers |
| Sub Title (in English) | |
| Keyword(1) | DML |
| Keyword(2) | Finite element method for plate bending problems |
| Keyword(3) | Finite element method for 3-dimensional solid problems |
| Keyword(4) | Internal sound field |
| 1st Author's Name | Kohei TAKAYANAGI |
| 1st Author's Affiliation | Graduate School of Design, Kyushu University() |
| 2nd Author's Name | Toshiya SAMEJIMA |
| 2nd Author's Affiliation | Faculty of Design, Kyushu University |
| 3rd Author's Name | Kazuhiko KAWAHARA |
| 3rd Author's Affiliation | Faculty of Design, Kyushu University |
| Date | 2013-11-15 |
| Paper # | EA2013-85,EMM2013-85 |
| Volume (vol) | vol.113 |
| Number (no) | 290 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |