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| Presentation | 2016-03-29 09:00 [Poster Presentation] Directivity control for a regular icosahedron loudspeaker based on the adaptive weighted least-squares method. Makoto Daikohara, Yoichi Haneda (UEC)  EA2015-105 SIP2015-154 SP2015-133 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper proposes an adaptive weighted least-squares method for controlling the directivity of a loudspeaker array. If we use the conventional least-squares method to design the filter of a loudspeaker array, high level sidelobes appear in the directivity pattern. In our previous study, we demonstrated that sidelobes can be suppressed using the weighted least-squares method. However, the weight coefficients were decided heuristically. In this study, to decide the optimum weight coefficients automatically, we investigate the adaptive algorithm of the least-squares method. First, we set an ideal directivity pattern by using the window function, and obtain the filter coefficients of the target loudspeaker array based on the least-squares method with an initial weighting factor. Next, we update the weighting factor by using the error between the ideal directional and radiation patterns, which are calculated by convoluting the filter coefficients and the transfer functions. Then, we repeat this process until the error level is satisfied by the end condition of the update. To confirm the performance of our proposed algorithm, we compared the proposed method with conventional least-squares-method. These results showed that the proposed method suppressed the sidelobes more efficiently than the conventional least-squares method; however, the main beam width in the case of the former was greater than that of the latter. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | loudspeaker array / least-squares-method / weight / directivity control / regular icosahedoron / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 521, EA2015-105, pp. 213-218, March 2016. | |
| Paper # | EA2015-105 | |
| Date of Issue | 2016-03-21 (EA, SIP, SP) | |
| 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 | EA2015-105 SIP2015-154 SP2015-133 |
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| Conference Information | |
| Committee | EA SP SIP |
| Conference Date | 2016-03-28 - 2016-03-29 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Beppu International Convention Center B-ConPlaza |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Engineering/Electro Acoustics, Speech, Signal Processing, and Related Topics |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2016-03-EA-SP-SIP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Directivity control for a regular icosahedron loudspeaker based on the adaptive weighted least-squares method. |
| Sub Title (in English) | |
| Keyword(1) | loudspeaker array |
| Keyword(2) | least-squares-method |
| Keyword(3) | weight |
| Keyword(4) | directivity control |
| Keyword(5) | regular icosahedoron |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Makoto Daikohara |
| 1st Author's Affiliation | The University of Electro-Communications (UEC) |
| 2nd Author's Name | Yoichi Haneda |
| 2nd Author's Affiliation | The University of Electro-Communications (UEC) |
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| Speaker | Author-1 |
| Date Time | 2016-03-29 09:00:00 |
| Presentation Time | 90 minutes |
| Registration for | EA |
| Paper # | EA2015-105, SIP2015-154, SP2015-133 |
| Volume (vol) | vol.115 |
| Number (no) | no.521(EA), no.522(SIP), no.523(SP) |
| Page | pp.213-218 |
| #Pages | 6 |
| Date of Issue | 2016-03-21 (EA, SIP, SP) |
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