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Paper Abstract and Keywords
Presentation 2026-03-04 14:30
[Poster Presentation] Improving the Precision of on Acoustic Imaging of Invisible Regions Using Highly Directional Source and Pulse Compression Technique
Raimu Komatsu, Tsubasa Kusano, Kan Okubo (Tokyo Metropolitan Univ.) EA2025-166 SIP2025-186 SP2025-119
Abstract (in Japanese) (See Japanese page) 
(in English) In this study, we investigate high-precision acoustic imaging in occluded regions by combining a highly directive sound source, namely a parametric speaker, with pulse compression techniques. Using a multiplexed modulation scheme based on M-sequence coded signals, the carrier component and the information-bearing component are separated and analyzed to comparatively evaluate the detection characteristics of reflected signals in visible and occluded regions. The results demonstrate that the carrier component provides high angular resolution in visible regions, whereas the information component is effective for detecting targets in occluded regions via diffraction. In addition, the feasibility of improving spatial resolution through the introduction of a microphone array on the receiving side is discussed, indicating the potential for further enhancement by applying array signal processing techniques.
Keyword (in Japanese) (See Japanese page) 
(in English) Invisible regions imaging / acoustic sensing / parametric-speaker / M-sequence modulation signal / diffraction phenomenon / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 370, SIP2025-186, pp. 544-549, March 2026.
Paper # SIP2025-186 
Date of Issue 2026-02-23 (EA, SIP, SP) 
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 EA2025-166 SIP2025-186 SP2025-119

Conference Information
Committee SP EA SIP IPSJ-SLP  
Conference Date 2026-03-02 - 2026-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIP 
Conference Code 2026-03-SP-EA-SIP-SLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improving the Precision of on Acoustic Imaging of Invisible Regions Using Highly Directional Source and Pulse Compression Technique 
Sub Title (in English)  
Keyword(1) Invisible regions imaging  
Keyword(2) acoustic sensing  
Keyword(3) parametric-speaker  
Keyword(4) M-sequence modulation signal  
Keyword(5) diffraction phenomenon  
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1st Author's Name Raimu Komatsu  
1st Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
2nd Author's Name Tsubasa Kusano  
2nd Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
3rd Author's Name Kan Okubo  
3rd Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
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Speaker Author-1 
Date Time 2026-03-04 14:30:00 
Presentation Time 80 minutes 
Registration for SIP 
Paper # EA2025-166, SIP2025-186, SP2025-119 
Volume (vol) vol.125 
Number (no) no.369(EA), no.370(SIP), no.371(SP) 
Page pp.544-549 
#Pages 6 
Date of Issue 2026-02-23 (EA, SIP, SP) 

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