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Paper Abstract and Keywords
Presentation 2015-03-03 10:45
[Poster Presentation] An evaluation of audio spot expansion based on separating emission with curved-type parametric loudspeakers
Tadashi Matsui, Daisuke Ikefuji, Masato Nakayama, Takanobu Nishiura (Ritsumeikan Univ.) EA2014-118 SIP2014-159 SP2014-181
Abstract (in Japanese) (See Japanese page) 
(in English) The parametric loudspeaker has sharper directivity and it can achieve an audio spot which can represent the audible sound to a narrow spatial area.
However, the parametric loudspeaker has problems caused by reflections and intercepts because they become unwanted noise to other listeners except a target listener.
Thus, we have proposed the design of the audio spot based on separating emission of the carrier and sideband waves.
The previous method has designed a small audio spot using flat-type parametric loudspeakers.
In this paper, we therefor propose a new design of a large audio spot based on separating emission of the carrier and sideband waves using curved-type parametric loudspeakers.
Moreover, in the proposed method, we utilize the sideband waves which are separated to multiple bandlimited waves for reducing the unwanted noise by the intermodulation distortion.
As a result of evaluation experiments, we confirmed the effectiveness of the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) Parametric loudspeaker / Audio spot / Separating emission / Curved-type parametric loudspeaker / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 473, EA2014-118, pp. 255-260, March 2015.
Paper # EA2014-118 
Date of Issue 2015-02-23 (EA, SIP, SP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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 EA2014-118 SIP2014-159 SP2014-181

Conference Information
Committee SIP EA SP  
Conference Date 2015-03-02 - 2015-03-03 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
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) An evaluation of audio spot expansion based on separating emission with curved-type parametric loudspeakers 
Sub Title (in English)  
Keyword(1) Parametric loudspeaker  
Keyword(2) Audio spot  
Keyword(3) Separating emission  
Keyword(4) Curved-type parametric loudspeaker  
Keyword(5)  
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1st Author's Name Tadashi Matsui  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Daisuke Ikefuji  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Masato Nakayama  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
4th Author's Name Takanobu Nishiura  
4th Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2015-03-03 10:45:00 
Presentation Time 90 minutes 
Registration for EA 
Paper # EA2014-118, SIP2014-159, SP2014-181 
Volume (vol) vol.114 
Number (no) no.473(EA), no.474(SIP), no.475(SP) 
Page pp.255-260 
#Pages 6 
Date of Issue 2015-02-23 (EA, SIP, SP) 

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