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Paper Abstract and Keywords
Presentation 2023-07-27 16:40
Experimental study on phase control of airborne ultrasound using thin films
Youichi Ito (Nihon Univ.) US2023-23
Abstract (in Japanese) (See Japanese page) 
(in English) Abstract Various applied technologies using powerful airborne ultrasonic waves have been developed, and their use in various fields is rapidly increasing. One of the important elemental technologies related to this is the sound source for generating ultrasonic waves.
A sound source that generates ultrasonic waves by flexurally vibrating a metal plate can generate high-power airborne ultrasonic waves with high efficiency, making it a powerful device for applied technology.
The sound sources (20 kHz to 100 kHz) using a circular or rectangular flexural vibration plate are a representative device. The sound waves radiated from these vibrating plates are emitted in a specific angular direction with respect to the vibrating plates because adjacent vibrating surfaces across the nodal line of the flexural vibration vibrate in mutually opposite phases. In order to change the radiating direction of the sound waves, we devised a method of controlling the phase of the sound waves radiated from the vibrating plate using thin films. However, the details of this phase control technique have not been sufficiently studied so far.
In this report, a detailed experimental study is carried out on the method of controlling the phase of radiated sound waves using thin films. In addition, two ultrasonic sound sources applying this technology are also introduced.
Keyword (in Japanese) (See Japanese page) 
(in English) Powerful airborne ultrasound / flexural vibrating plate / thin film / phase control / ultrasonic beam / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 135, US2023-23, pp. 28-33, July 2023.
Paper # US2023-23 
Date of Issue 2023-07-20 (US) 
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 US2023-23

Conference Information
Committee US  
Conference Date 2023-07-27 - 2023-07-28 
Place (in Japanese) (See Japanese page) 
Place (in English) West Japan General Exhibition Center Annex 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Material characterization, Ultrasonics, etc. 
Paper Information
Registration To US 
Conference Code 2023-07-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental study on phase control of airborne ultrasound using thin films 
Sub Title (in English)  
Keyword(1) Powerful airborne ultrasound  
Keyword(2) flexural vibrating plate  
Keyword(3) thin film  
Keyword(4) phase control  
Keyword(5) ultrasonic beam  
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1st Author's Name Youichi Ito  
1st Author's Affiliation Nihon University (Nihon Univ.)
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Speaker Author-1 
Date Time 2023-07-27 16:40:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2023-23 
Volume (vol) vol.123 
Number (no) no.135 
Page pp.28-33 
#Pages 6 
Date of Issue 2023-07-20 (US) 

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