Paper Abstract and Keywords |
Presentation |
2015-03-03 10:45
[Poster Presentation]
Investigation of local area sound reproduction using a circular array of loudspeakers with null-space based sound field control Takayuki Seki, Yoichi Haneda (UEC) EA2014-114 SIP2014-155 SP2014-177 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
We investigated a local area sound reproduction system where the listener can hear the sound only in the proximity of the loudspeaker. In this paper, we used the circular loudspeaker array with null-space based sound field control (NBSFC) to create a local area sound reproduction system based on the boundary surface control principle. The performance of the prototype system of the circular loudspeaker array was evaluated in an anechoic chamber. As a result, the prototype system exhibited a quicker sound attenuation than the monopole sound source in the frequency range of 500–1500 Hz. In addition, we compared the filter coefficients of the loudspeaker array of the NBSFC method with those of the evanescent wave method. In the NBSFC method, the filters on both side of the filter that has a positive phase have opposite phases and half amplitudes. On the other hand, in the evanescent wave method, the filters alternately exhibit a plus or minus sign while having the same amplitude. In both cases, the sounds radiated from the loudspeakers may instantaneously cancel each other by opposite phases to achieve a quicker sound attenuation. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
local area sound reproduction / evanescent wave / circular array of loudspeakers / null-space based sound field control / boundary surface control principle / / / |
Reference Info. |
IEICE Tech. Rep., vol. 114, no. 473, EA2014-114, pp. 231-236, March 2015. |
Paper # |
EA2014-114 |
Date of Issue |
2015-02-23 (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) |
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EA2014-114 SIP2014-155 SP2014-177 |
Conference Information |
Committee |
SIP EA SP |
Conference Date |
2015-03-02 - 2015-03-03 |
Place (in Japanese) |
(See Japanese page) |
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Paper Information |
Registration To |
EA |
Conference Code |
2015-03-SIP-EA-SP |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Investigation of local area sound reproduction using a circular array of loudspeakers with null-space based sound field control |
Sub Title (in English) |
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Keyword(1) |
local area sound reproduction |
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evanescent wave |
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circular array of loudspeakers |
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null-space based sound field control |
Keyword(5) |
boundary surface control principle |
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1st Author's Name |
Takayuki Seki |
1st Author's Affiliation |
University of Electro-Communications (UEC) |
2nd Author's Name |
Yoichi Haneda |
2nd Author's Affiliation |
University of Electro-Communications (UEC) |
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Speaker |
Author-1 |
Date Time |
2015-03-03 10:45:00 |
Presentation Time |
90 minutes |
Registration for |
EA |
Paper # |
EA2014-114, SIP2014-155, SP2014-177 |
Volume (vol) |
vol.114 |
Number (no) |
no.473(EA), no.474(SIP), no.475(SP) |
Page |
pp.231-236 |
#Pages |
6 |
Date of Issue |
2015-02-23 (EA, SIP, SP) |
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