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Paper Abstract and Keywords
Presentation 2024-07-07 09:00
A study on playback sound and power consumption of a vehicle speaker system for preventing deer-vehicle collisions using super-directional sound
Hiroki Matsuzaki (HUS) EA2024-21
Abstract (in Japanese) (See Japanese page) 
(in English) There are warning whistles that alert deer and prevent collisions with vehicles. The sound must be loud enough for the deer to perceive it before the vehicle approaches the deer. The sound that are loud enough for deer to hear at a distance without being drowned out by environmental noise or road noise can become noise both inside and outside the vehicle. In order to prevent the warning sounds from becoming noise, a method has been proposed that uses a parametric loudspeaker to deliver sound only in the direction the vehicle is traveling. In this method, because the parametric loudspeaker is composed of many ultrasonic oscillators, it consumes more power than direct radiator loudspeaker, and there is concern that it will put a heavy strain on the vehicle’s battery. Furthermore, even if the amplitude of the input signal as a modulating wave is zero, in the case of amplitude modulation, a modulated wave with an amplitude half the maximum value is input to the ultrasonic oscillators, consuming power. This paper reports the results of an investigation into the power consumed by parametric loudspeakers and the modulated wave and playback sound of dynamic carrier modulation, which can reduce power consumption by varying the amplitude of the carrier wave according to the input signal level.
Keyword (in Japanese) (See Japanese page) 
(in English) super-directional sound / parametric loudspeaker / power consumption / deer and vehicle / collision prevention / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 94, EA2024-21, pp. 60-66, July 2024.
Paper # EA2024-21 
Date of Issue 2024-06-29 (EA) 
ISSN 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 EA2024-21

Conference Information
Committee EA ASJ-H ASJ-MA ASJ-SP  
Conference Date 2024-07-06 - 2024-07-07 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To EA 
Conference Code 2024-07-EA-H-MA-SP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on playback sound and power consumption of a vehicle speaker system for preventing deer-vehicle collisions using super-directional sound 
Sub Title (in English)  
Keyword(1) super-directional sound  
Keyword(2) parametric loudspeaker  
Keyword(3) power consumption  
Keyword(4) deer and vehicle  
Keyword(5) collision prevention  
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1st Author's Name Hiroki Matsuzaki  
1st Author's Affiliation Hokkaido University of Science (HUS)
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Speaker Author-1 
Date Time 2024-07-07 09:00:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2024-21 
Volume (vol) vol.124 
Number (no) no.94 
Page pp.60-66 
#Pages 7 
Date of Issue 2024-06-29 (EA) 

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