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Paper Abstract and Keywords
Presentation 2014-01-28 10:25
Modified-error feedback ANC system with linear prediction filter
Nobuhiro Miyazaki, Yoshinobu Kajikawa (Kansai Univ.) EA2013-110
Abstract (in Japanese) (See Japanese page) 
(in English) We have studied an ANC (Active Noise Control) system for reducing MR noise, which is generated from MRI device and realizing clear verbal communication
between medical staff.
Ordinary ANC systems generally have the secondary path.
Therefore, the Filtered-x algorithm diverges if the phase error of the secondary path model does not satisfy the stability condition －π/2 to π/2.
In this paper, we focus on the modified-error feedback ANC system.
We have proposed a head-mounted ANC system for realizing clear verbal communication between medical staff.
This system consists of microphones and loudspeakers located near the user's ear.
This system can realize clear verbal communication because the user's ears are not covered with anything.
In the head-mounted ANC system, the microphones are located near the user's ear and the user's voice is consequently picked up at the microphones.
Therefore, user's voice is also radiated from the loudspeakers as echo signal.
A solution to this problem is to utilize a linear prediction filter.
The linear prediction filter can seprate wideband noise from narrowband noise by setting an appropriate delay.
In this paper, we examine the appropriate delay to separate speech signal and MR noise and the suppression ability of echo signal through computer simulation.
Keyword (in Japanese) (See Japanese page) 
(in English) Active Noise Control / MR noise / Modified-error feedback ANC system / Linear Prediction Filter / Head-mounted ANC system / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 413, EA2013-110, pp. 39-44, Jan. 2014.
Paper # EA2013-110 
Date of Issue 2014-01-20 (EA) 
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)
Download PDF EA2013-110

Conference Information
Committee EA US  
Conference Date 2014-01-27 - 2014-01-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Kansai University, Centenary Memorial Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics，and Related Topics 
Paper Information
Registration To EA 
Conference Code 2014-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Modified-error feedback ANC system with linear prediction filter 
Sub Title (in English)  
Keyword(1) Active Noise Control  
Keyword(2) MR noise  
Keyword(3) Modified-error feedback ANC system  
Keyword(4) Linear Prediction Filter  
Keyword(5) Head-mounted ANC system  
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Keyword(7)  
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1st Author's Name Nobuhiro Miyazaki  
1st Author's Affiliation Kansai University (Kansai Univ.)
2nd Author's Name Yoshinobu Kajikawa  
2nd Author's Affiliation Kansai University (Kansai Univ.)
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Speaker Author-1 
Date Time 2014-01-28 10:25:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2013-110 
Volume (vol) vol.113 
Number (no) no.413 
Page pp.39-44 
#Pages 6 
Date of Issue 2014-01-20 (EA) 

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