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Paper Abstract and Keywords
Presentation 2016-03-29 09:00
[Poster Presentation] Design of a directive loudspeaker array filter based on weighted least-squares method by controlling window function for desired sound pressure
Koya Sato, Takayuki Seki, Yoihi Haneda (UEC) EA2015-106 SIP2015-155 SP2015-134
Abstract (in Japanese) (See Japanese page) 
(in English) In this study, we investigate a circular loudspeaker array (which typically is a watch type wearable terminal) with few sound leakages into the neighborhood for directivity control. We used a multi-point control method, which can be used to set a desired sound pressure to control directivity in detail.A multi-point control method can generate high directivity in the target direction, while sidelobes appear in other directions. When the intensity of sidelobes is high it results in sound leakage.Therefore, we propose a novel algorithm that can suppress sidelobes by setting smooth desired sound pressures around a loudspeaker array using a window function.
Moreover, we introduced a technique for suppressing sidelobes using the weighted least-squares method. Next, we conducted directivity simulations using a cylindrical loudspeaker array based on the proposed method.Results indicated that although the beam width of the directivity became wider,
sidelobe suppression was achieved through the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) loudspeaker array / directivity control / multi-point control method / least-squares method / window function / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 521, EA2015-106, pp. 219-224, March 2016.
Paper # EA2015-106 
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 EA2015-106 SIP2015-155 SP2015-134

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) Design of a directive loudspeaker array filter based on weighted least-squares method by controlling window function for desired sound pressure 
Sub Title (in English)  
Keyword(1) loudspeaker array  
Keyword(2) directivity control  
Keyword(3) multi-point control method  
Keyword(4) least-squares method  
Keyword(5) window function  
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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 Takayuki Seki  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Yoihi Haneda  
3rd 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 # EA2015-106, SIP2015-155, SP2015-134 
Volume (vol) vol.115 
Number (no) no.521(EA), no.522(SIP), no.523(SP) 
Page pp.219-224 
#Pages 6 
Date of Issue 2016-03-21 (EA, SIP, SP) 

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