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Paper Abstract and Keywords
Presentation 2014-03-08 10:35
A Smart-Phone Based System To Detect Warning Sound For Hearing Impaired People
Koichiro Takeuchi, Tetsuya Matsumoto (Nagoya Univ.), Yoshinori Takeuchi (Daido Univ.), Hiroaki Kudo, Noboru Ohnishi (Nagoya Univ.) WIT2013-82
Abstract (in Japanese) (See Japanese page) 
(in English) The purpose of this study is to develop a system detecting warning sound for a pedestrian. The system applies a IIR band pass filter to an input signal as preprocessing, and then applies a IIR comb filter corresponding to the fundamental frequency of warning sounds. The system obtains the ratio of the mean of the absolute values of the input signal to the output signal of the comb filter, and detects warning sounds by thresholding the ratio. We conducted experiments, in which ambulance sirens corrupted by three kinds of noise samples are inputted to the system. As a result, the proposed system can detect the ambulance sirens with accuracy above of 94% under noisy environments of SNR 10, 0dB, and with accuracy of about 65% under noisy environment of SNR -10dB. However, the system cannot well detect an ambulance siren recorded on the road with accuracy of above 40%.
Keyword (in Japanese) (See Japanese page) 
(in English) sound source recognition / warning sound / IIR comb filter / / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 481, WIT2013-82, pp. 87-92, March 2014.
Paper # WIT2013-82 
Date of Issue 2014-02-28 (WIT) 
ISSN Print edition: ISSN 0913-5685    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)
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Conference Information
Committee WIT  
Conference Date 2014-03-07 - 2014-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Kasuga Campus, Tsukuba University of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Well-being Information Technology, etc. 
Paper Information
Registration To WIT 
Conference Code 2014-03-WIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Smart-Phone Based System To Detect Warning Sound For Hearing Impaired People 
Sub Title (in English)  
Keyword(1) sound source recognition  
Keyword(2) warning sound  
Keyword(3) IIR comb filter  
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1st Author's Name Koichiro Takeuchi  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Tetsuya Matsumoto  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Yoshinori Takeuchi  
3rd Author's Affiliation Daido University (Daido Univ.)
4th Author's Name Hiroaki Kudo  
4th Author's Affiliation Nagoya University (Nagoya Univ.)
5th Author's Name Noboru Ohnishi  
5th Author's Affiliation Nagoya University (Nagoya Univ.)
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Speaker Author-1 
Date Time 2014-03-08 10:35:00 
Presentation Time 25 minutes 
Registration for WIT 
Paper # WIT2013-82 
Volume (vol) vol.113 
Number (no) no.481 
Page pp.87-92 
#Pages 6 
Date of Issue 2014-02-28 (WIT) 

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