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Paper Abstract and Keywords
Presentation 2023-09-01 11:20
[Invited Talk] Development of open-ear earphones that minimize sound leakage by opposite-phase sound waves and realization of Acoustic XR service
Tatsuya Kako (NTT) EA2023-27
Abstract (in Japanese) (See Japanese page) 
(in English) In response to the spread of telework and web conferencing, and the growing need to value private time and space, the company aims to create the ultimate private acoustic space that delivers only the "sounds you want to hear" and prevents the delivery of "sounds you do not want to hear or do not want to hear".
As part of this effort, NTT has researched and developed new earphones that hold sound in a very small space, and in November 2022, NTT Sonority, NTT's first acoustic business, began selling open-ear earphones using this technology. These open-ear earphones, which are not inserted into the ear, minimize sound leakage and enable users to comfortably enjoy their own acoustic space while communicating with those around them. Furthermore, using these open-ear earphones, research and development of acoustic XR, in which sounds in real space and virtual space are merged without discomfort, is being promoted.
Keyword (in Japanese) (See Japanese page) 
(in English) Near-field sound reproduction / Speaker enclosure / Open-ear earphones / Spatial audio / XR / AR / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 170, EA2023-27, pp. 53-60, Aug. 2023.
Paper # EA2023-27 
Date of Issue 2023-08-24 (EA) 
ISSN 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 EA ASJ-H  
Conference Date 2023-08-31 - 2023-09-01 
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 2023-08-EA-H 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of open-ear earphones that minimize sound leakage by opposite-phase sound waves and realization of Acoustic XR service 
Sub Title (in English)  
Keyword(1) Near-field sound reproduction  
Keyword(2) Speaker enclosure  
Keyword(3) Open-ear earphones  
Keyword(4) Spatial audio  
Keyword(5) XR  
Keyword(6) AR  
1st Author's Name Tatsuya Kako  
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Date Time 2023-09-01 11:20:00 
Presentation Time 60 minutes 
Registration for EA 
Paper # EA2023-27 
Volume (vol) vol.123 
Number (no) no.170 
Page pp.53-60 
Date of Issue 2023-08-24 (EA) 

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