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Paper Abstract and Keywords
Presentation 2015-08-03 15:50
Multiple sound spots generation by spatial filtering in wavenumber domain using a linear loudspeaker array
Takuma Okamoto (NICT), Atsushi Sakaguchi (Panasonic) EA2015-15
Abstract (in Japanese) (See Japanese page) 
(in English) An analytical method for generating acoustically bright and dark zones at arbitrary horizontal positions using a linear loudspeaker array was proposed. This method is based on the spatial Fourier transform and models sound pressures at the control line as a rectangular window corresponding to bright and dark zones. It is widely known that a rectangular window contains sidelobes. To improve the previous proposed method with high dynamic range, this paper introduces a cosine window, which contains less sidelobes, for modeling sound pressures instead of a conventional rectangular window. Computer simulation results show that the proposed method using a cosine window can control sound field more accurately than that using a simple rectangular window. In addition, a linear array of 64 loudspeakers was actually implemented and the measurement results show that the proposed methods outperform the conventional energy difference maximization method.
Keyword (in Japanese) (See Japanese page) 
(in English) multizone / loudspeaker array / spatial Fourier transform / spatial filtering / window function / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 169, EA2015-15, pp. 29-34, Aug. 2015.
Paper # EA2015-15 
Date of Issue 2015-07-27 (EA) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 EA2015-15

Conference Information
Committee EA ASJ-H  
Conference Date 2015-08-03 - 2015-08-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ., Research Inst. of Electrical Communication 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Engineering/Electro Acoustics, Psychological and Physiological Acoustics, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2015-08-EA-H 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Multiple sound spots generation by spatial filtering in wavenumber domain using a linear loudspeaker array 
Sub Title (in English)  
Keyword(1) multizone  
Keyword(2) loudspeaker array  
Keyword(3) spatial Fourier transform  
Keyword(4) spatial filtering  
Keyword(5) window function  
1st Author's Name Takuma Okamoto  
1st Author's Affiliation National Institute of Information and Communications Technology (NICT)
2nd Author's Name Atsushi Sakaguchi  
2nd Author's Affiliation Panasonic Corporation (Panasonic)
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Date Time 2015-08-03 15:50:00 
Presentation Time 30 
Registration for EA 
Paper # IEICE-EA2015-15 
Volume (vol) IEICE-115 
Number (no) no.169 
Page pp.29-34 
#Pages IEICE-6 
Date of Issue IEICE-EA-2015-07-27 

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