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Paper Abstract and Keywords
Presentation 2025-12-18 13:00
[Poster Presentation] Feature Extraction of Pharyngeal Motion Sounds Using a Throat Microphone
Miho Sakai, Hisako Orimoto (Pre.Univ.Hiroshima) EA2025-65
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, the transition from chewy foods to soft foods has led to concern regarding a decrease in mastication frequency. Lower mastication frequency and rapid eating tend to be associated with a higher BMI. A reduction in mastication frequency can lead to obesity. In addition, negative effects on health such as incomplete development of the jaw and oral diseases have been reported. This indicates that technologies which can evaluate and support proper eating behavior are needed. Conventional methods for evaluating eating and swallowing functions include `Videofluoroscopic swallowing study' and `Repetitive saliva swallowing test'. However, since they require exclusive devices and medical professionals, they are inconvenient for home use. Furthermore, while many previous studies have focused on swallowing sounds, only a few have simultaneously focused on both chewing and swallowing. In this study, we simultaneously measure the pharyngeal motion sounds of chewing and swallowing sounds using only a throat microphone, extract pharyngeal motion sounds through noise reduction and distinguish between chewing and swallowing sounds. The effectiveness of the proposed method was confirmed by experiments using actual observed sound data.
Keyword (in Japanese) (See Japanese page) 
(in English) Pharyngeal motion sounds / Throat-microphone / Noise reduction / Bayes' theorem / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 300, EA2025-65, pp. 31-36, Dec. 2025.
Paper # EA2025-65 
Date of Issue 2025-12-11 (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 EA2025-65

Conference Information
Committee EA US  
Conference Date 2025-12-18 - 2025-12-19 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonics, etc. 
Paper Information
Registration To EA 
Conference Code 2025-12-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Feature Extraction of Pharyngeal Motion Sounds Using a Throat Microphone 
Sub Title (in English)  
Keyword(1) Pharyngeal motion sounds  
Keyword(2) Throat-microphone  
Keyword(3) Noise reduction  
Keyword(4) Bayes' theorem  
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1st Author's Name Miho Sakai  
1st Author's Affiliation Prefectural University of Hiroshima (Pre.Univ.Hiroshima)
2nd Author's Name Hisako Orimoto  
2nd Author's Affiliation Prefectural University of Hiroshima (Pre.Univ.Hiroshima)
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Speaker Author-1 
Date Time 2025-12-18 13:00:00 
Presentation Time 90 minutes 
Registration for EA 
Paper # EA2025-65 
Volume (vol) vol.125 
Number (no) no.300 
Page pp.31-36 
#Pages 6 
Date of Issue 2025-12-11 (EA) 

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