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Paper Abstract and Keywords
Presentation 2022-02-24 14:20
Detection method of bathroom conditions by measuring acoustic characteristics
Yoshitaka Kawabe, Yuji Wada, Kentaro Nakamura (Tokyo Tech) US2021-71
Abstract (in Japanese) (See Japanese page) 
(in English) With the increase in the number of elderly people living alone as well as the patients kept in isolation because of recent COVID-19 pandemic, there is a demand for remote monitoring support usable in a room. However, use of camera in bathrooms should be avoided with concerning privacy issue. Although a watching system based on sensor fusion is commercially available, it forces us an additional cost. In this report, we propose a monitoring support system based on the acoustic responses of room utilizing the existing audio devices in the room; which is relatively immune to privacy issue.
We aim to detect a person in a bathroom and also his/her posture by measuring the shift in the frequency characteristics of the room. In practice, the loudspeaker and microphone of a remote controller installed on the inner wall of bath room can be used to obtain the frequency responses. We seek for the feasibility of the proposed method through finite element simulation and experiments with a 1/4-scaled bathroom model. Existence of person, person’s posture, and the effect of the temperature on the estimation accuracy are studied by introducing two simple criteria. Existence of a person was successfully detected with the accuracy 100%, while the posture was estimated correctly at the accuracy of 92% in simulations. The experiments showed almost the same results as the simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) Acoustics characteristics / frequency response / bathroom / watching support / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 380, US2021-71, pp. 10-15, Feb. 2022.
Paper # US2021-71 
Date of Issue 2022-02-17 (US) 
ISSN 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 US2021-71

Conference Information
Committee US  
Conference Date 2022-02-24 - 2022-02-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Acoustic imaging, NDT, Ultrasound in medicine, Ultrasonics, etc. 
Paper Information
Registration To US 
Conference Code 2022-02-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Detection method of bathroom conditions by measuring acoustic characteristics 
Sub Title (in English)  
Keyword(1) Acoustics characteristics  
Keyword(2) frequency response  
Keyword(3) bathroom  
Keyword(4) watching support  
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1st Author's Name Yoshitaka Kawabe  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Yuji Wada  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Kentaro Nakamura  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2022-02-24 14:20:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2021-71 
Volume (vol) vol.121 
Number (no) no.380 
Page pp.10-15 
#Pages
Date of Issue 2022-02-17 (US) 


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