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Paper Abstract and Keywords
Presentation 2013-03-08 09:30
A study on Noise Suppression for Cardiac Sound
Takashi Sudo (TOSHIBA/Yokohama National Univ.), Hirokazu Tanaka (TOSHIBA), Chika Sugimoto, Ryuji Kohno (Yokohama National Univ.) SIS2012-62
Abstract (in Japanese) (See Japanese page) 
(in English) The needs of health care is growing in recent years. The home-oriented health care and medical equipment is spreading. A digital stethoscope is also appearing. This research aims at monitoring a user's heart sound always anywhere with the digital stethoscope built in the wearable device. In this case, if a heart sound is monitored with a digital stethoscope, it will be expected that the ambient noise from environment mixes or noise is overlapped by motion of the body. This research examined how to suppress the sudden non-stationary noise from the stethoscope signal of one channel. In this paper, we propose the method of presuming the excitation signal in linear prediction analysis as a non-stationary noise component. Compared with the spectral subtraction method which always updates a noise spectrum, our method has improved spectrum distortion of 2.2 dB, and has improved the amount of noise suppression of 3.4 dB.
Keyword (in Japanese) (See Japanese page) 
(in English) Heart Sound / Wearable Devices / 1-channel / Non-Stationary Noise / linear prediction analysis / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 465, SIS2012-62, pp. 91-96, March 2013.
Paper # SIS2012-62 
Date of Issue 2013-02-28 (SIS) 
ISSN Print edition: ISSN 0913-5685    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)
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Conference Information
Committee SIS  
Conference Date 2013-03-07 - 2013-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Create Hamamatsu 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIS 
Conference Code 2013-03-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on Noise Suppression for Cardiac Sound 
Sub Title (in English)  
Keyword(1) Heart Sound  
Keyword(2) Wearable Devices  
Keyword(3) 1-channel  
Keyword(4) Non-Stationary Noise  
Keyword(5) linear prediction analysis  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Takashi Sudo  
1st Author's Affiliation Toshiba Corporation/Yokohama National University (TOSHIBA/Yokohama National Univ.)
2nd Author's Name Hirokazu Tanaka  
2nd Author's Affiliation Toshiba Corporation (TOSHIBA)
3rd Author's Name Chika Sugimoto  
3rd Author's Affiliation Yokohama National University (Yokohama National Univ.)
4th Author's Name Ryuji Kohno  
4th Author's Affiliation Yokohama National University (Yokohama National Univ.)
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Speaker Author-1 
Date Time 2013-03-08 09:30:00 
Presentation Time 30 minutes 
Registration for SIS 
Paper # SIS2012-62 
Volume (vol) vol.112 
Number (no) no.465 
Page pp.91-96 
#Pages 6 
Date of Issue 2013-02-28 (SIS) 

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