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Paper Abstract and Keywords
Presentation 2017-05-22 14:20
A Study on Parametric Loudspeaker with Random Element Arrangement
Shota Kinjo, Yoshifumi Nagata, Toyota Fujioka, Masato Abe (Iwate Univ.) US2017-16
Abstract (in Japanese) (See Japanese page) 
(in English) In order to suppress grating lobe in directivity pattern of parametric loudspeaker with regular transducer arrangement, parametric loudspeaker with random element arrangement was developed. Furthermore, in order to control output beam pattern of parametric loudspeaker with high precision, we compensated elements variation to be used and developed steering system. In addition, we performed computer simulation the directivity of parametric loudspeaker with random element arrangement and measured them in the anechoic room. As a result, it was confirmed that grating lobe caused by the parametric loudspeaker with regular element arrangement was suppressed by that with random element arrangement. Moreover, when the ultrasonic beam was generated using beamformer coefficient calculated by GA, it is confirmed that the performance to suppress grating lobe was improved as compared with delay compensation.
Keyword (in Japanese) (See Japanese page) 
(in English) Parametric loudspeaker / random element arrangement / beamsteering / genetic algorithms / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 41, US2017-16, pp. 13-18, May 2017.
Paper # US2017-16 
Date of Issue 2017-05-15 (US) 
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)
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Conference Information
Committee US  
Conference Date 2017-05-22 - 2017-05-22 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To US 
Conference Code 2017-05-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Parametric Loudspeaker with Random Element Arrangement 
Sub Title (in English)  
Keyword(1) Parametric loudspeaker  
Keyword(2) random element arrangement  
Keyword(3) beamsteering  
Keyword(4) genetic algorithms  
1st Author's Name Shota Kinjo  
1st Author's Affiliation Iwate University (Iwate Univ.)
2nd Author's Name Yoshifumi Nagata  
2nd Author's Affiliation Iwate University (Iwate Univ.)
3rd Author's Name Toyota Fujioka  
3rd Author's Affiliation Iwate University (Iwate Univ.)
4th Author's Name Masato Abe  
4th Author's Affiliation Iwate University (Iwate Univ.)
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Speaker Author-1 
Date Time 2017-05-22 14:20:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2017-16 
Volume (vol) vol.117 
Number (no) no.41 
Page pp.13-18 
Date of Issue 2017-05-15 (US) 

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