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| Presentation | 2017-03-02 09:00 [Poster Presentation] Three-dimensional directivity control based on circular harmonic modes using a circular loudspeaker array Koya Sato, Yoichi Haneda (UEC)  EA2016-119 SIP2016-174 SP2016-114 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper describes a filter design method that enables three-dimensional (3-D) directivity control by using a circular loudspeaker array. Digital filters for the circular array can be designed in the circular harmonic domain as the array is expressed in cylindrical coordinates. However, directivity control in 3-D space cannot be considered because its bases in the circular harmonic domain are expressed only on the x-y plane. Therefore, we measure 3-D directivity patterns when a prototype circular loudspeaker array is driven by each circular harmonic mode. We propose a filter design based on the combination of the measured 3-D directivity patterns as well as a method to suppress filter gains at low frequencies by limiting high order using the L1-norm optimization. We conducted a directivity simulation and a sound distortion experiment to confirm the performance of the proposed method. Our results showed that the proposed method performed better the 3-D directivity control and sound reproduction with little distortion than previous methods. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | circular array / directivity control / circular harmonic expansion / L1-norm / least-squares method / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 116, no. 475, EA2016-119, pp. 213-218, March 2017. | |
| Paper # | EA2016-119 | |
| Date of Issue | 2017-02-22 (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 | EA2016-119 SIP2016-174 SP2016-114 |
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| Conference Information | |
| Committee | SP SIP EA |
| Conference Date | 2017-03-01 - 2017-03-02 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawa Industry Support Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech, Engineering/Electro Acoustics, Signal Processing, and Related Topics |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2017-03-SP-SIP-EA |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Three-dimensional directivity control based on circular harmonic modes using a circular loudspeaker array |
| Sub Title (in English) | |
| Keyword(1) | circular array |
| Keyword(2) | directivity control |
| Keyword(3) | circular harmonic expansion |
| Keyword(4) | L1-norm |
| Keyword(5) | least-squares method |
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| Keyword(8) | |
| 1st Author's Name | Koya Sato |
| 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 | 2017-03-02 09:00:00 |
| Presentation Time | 90 minutes |
| Registration for | EA |
| Paper # | EA2016-119, SIP2016-174, SP2016-114 |
| Volume (vol) | vol.116 |
| Number (no) | no.475(EA), no.476(SIP), no.477(SP) |
| Page | pp.213-218 |
| #Pages | 6 |
| Date of Issue | 2017-02-22 (EA, SIP, SP) |
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