Paper Abstract and Keywords |
Presentation |
2017-01-26 10:30
A study on feedback path re-estimation method under active noise control Kensaku Fujii (Kodaway Lab.), Mitsuji Muneyasu (Kansai Univ.) US2016-110 EA2016-78 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In this paper, we propose a method detecting the increase of the cancellation remainder of the feedback path under active noise control. The feedback path is inevitably formed in feedforward type active noise control systems detecting the reference noise with the noise detection microphone, which is generally canceled by the feedback control filter. The occurrence of howling can be thereby prevented. The feedback path, however, cannot be completely canceled. The remainder of the cancellation increases non-minimum components in the optimum noise control filter reducing the output of the error microphone to zero, which deteriorates the noise reduction effect. We also show that increase of the remainder can be recognized from the power gain of the auxiliary filter identifying the allover path from the noise detection microphone to the error microphone by using computer simulation. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
feedforward type / active noise control / noise detection microphone / feedback path / simultaneous equations method / auxiliary filter, / acoustic path change / |
Reference Info. |
IEICE Tech. Rep., vol. 116, no. 420, EA2016-78, pp. 61-66, Jan. 2017. |
Paper # |
EA2016-78 |
Date of Issue |
2017-01-18 (US, 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) |
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US2016-110 EA2016-78 |
Conference Information |
Committee |
EA US |
Conference Date |
2017-01-25 - 2017-01-26 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Doshisha Univ. |
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 |
2017-01-EA-US |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
A study on feedback path re-estimation method under active noise control |
Sub Title (in English) |
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Keyword(1) |
feedforward type |
Keyword(2) |
active noise control |
Keyword(3) |
noise detection microphone |
Keyword(4) |
feedback path |
Keyword(5) |
simultaneous equations method |
Keyword(6) |
auxiliary filter, |
Keyword(7) |
acoustic path change |
Keyword(8) |
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1st Author's Name |
Kensaku Fujii |
1st Author's Affiliation |
Kodaway Laboratory (Kodaway Lab.) |
2nd Author's Name |
Mitsuji Muneyasu |
2nd Author's Affiliation |
Kansai University (Kansai Univ.) |
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Speaker |
Author-1 |
Date Time |
2017-01-26 10:30:00 |
Presentation Time |
25 minutes |
Registration for |
EA |
Paper # |
US2016-110, EA2016-78 |
Volume (vol) |
vol.116 |
Number (no) |
no.419(US), no.420(EA) |
Page |
pp.185-190(US), pp.61-66(EA) |
#Pages |
6 |
Date of Issue |
2017-01-18 (US, EA) |
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