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| Presentation | 2013-11-15 15:30 Methods for analyzing vibration characteristics of distributed mode loudspeakers Kohei Takayanagi, Toshiya Samejima, Kazuhiko Kawahara (Kyushu Univ.)  EA2013-85 EMM2013-85 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | DML / Finite element method for plate bending problems / Finite element method for 3-dimensional solid problems / Internal sound field / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 290, EA2013-85, pp. 101-105, Nov. 2013. | |
| Paper # | EA2013-85 | |
| Date of Issue | 2013-11-07 (EA, EMM) | |
| 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 | EA2013-85 EMM2013-85 |
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| Conference Information | |
| Committee | EMM EA |
| Conference Date | 2013-11-14 - 2013-11-15 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Prefectural University of Hiroshima, Satellite Campus Hiroshima |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2013-11-EMM-EA |
| Language | Japanese |
| 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 |
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| 1st Author's Name | Kohei Takayanagi |
| 1st Author's Affiliation | Kyushu Univercity (Kyushu Univ.) |
| 2nd Author's Name | Toshiya Samejima |
| 2nd Author's Affiliation | Kyushu Univercity (Kyushu Univ.) |
| 3rd Author's Name | Kazuhiko Kawahara |
| 3rd Author's Affiliation | Kyushu Univercity (Kyushu Univ.) |
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| Speaker | Author-1 |
| Date Time | 2013-11-15 15:30:00 |
| Presentation Time | 30 minutes |
| Registration for | EA |
| Paper # | EA2013-85, EMM2013-85 |
| Volume (vol) | vol.113 |
| Number (no) | no.290(EA), no.291(EMM) |
| Page | pp.101-105 |
| #Pages | 5 |
| Date of Issue | 2013-11-07 (EA, EMM) |
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