Active noise control in three dimensional enclosure
Active Noise Control (ANC) uses a secondary source to generate a sound that will cancel an undesired noise from the primary source. In this study, a single sensor ANC system is investigated. The noise field at any point in a three dimensional enclosure is modeled as a moving average process. The ada...
Saved in:
Main Author: | |
---|---|
Other Authors: | |
Format: | Theses and Dissertations |
Language: | English |
Published: |
2009
|
Subjects: | |
Online Access: | http://hdl.handle.net/10356/19999 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-19999 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-199992023-03-11T17:06:44Z Active noise control in three dimensional enclosure Gong, Xuesong. Ling, Shih Fu School of Mechanical and Production Engineering DRNTU::Engineering::Mechanical engineering::Control engineering Active Noise Control (ANC) uses a secondary source to generate a sound that will cancel an undesired noise from the primary source. In this study, a single sensor ANC system is investigated. The noise field at any point in a three dimensional enclosure is modeled as a moving average process. The adaptive filtering algorithm, filtered-X LMS algorithm, is implemented to estimate characteristics of the process. These estimated characteristics are then used to predict the future values of the noise field. A canceling wave which is equal in magnitude and opposite in phase to these estimated values is generated. When the prediction is accurate, the two fields will interfere destructively and cancel each other. This approach avoids the acoustic feedback problem inherent in many multiple sensor ANC systems. Master of Engineering (MPE) 2009-12-14T07:56:44Z 2009-12-14T07:56:44Z 1996 1996 Thesis http://hdl.handle.net/10356/19999 en NANYANG TECHNOLOGICAL UNIVERSITY 114 p. application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
DRNTU::Engineering::Mechanical engineering::Control engineering |
spellingShingle |
DRNTU::Engineering::Mechanical engineering::Control engineering Gong, Xuesong. Active noise control in three dimensional enclosure |
description |
Active Noise Control (ANC) uses a secondary source to generate a sound that will cancel an undesired noise from the primary source. In this study, a single sensor ANC system is investigated. The noise field at any point in a three dimensional enclosure is modeled as a moving average process. The adaptive filtering algorithm, filtered-X LMS algorithm, is implemented to estimate characteristics of the process. These estimated characteristics are then used to predict the future values of the noise field. A canceling wave which is equal in magnitude and opposite in phase to these estimated values is generated. When the prediction is accurate, the two fields will interfere destructively and cancel each other. This approach avoids the acoustic feedback problem inherent in many multiple sensor ANC systems. |
author2 |
Ling, Shih Fu |
author_facet |
Ling, Shih Fu Gong, Xuesong. |
format |
Theses and Dissertations |
author |
Gong, Xuesong. |
author_sort |
Gong, Xuesong. |
title |
Active noise control in three dimensional enclosure |
title_short |
Active noise control in three dimensional enclosure |
title_full |
Active noise control in three dimensional enclosure |
title_fullStr |
Active noise control in three dimensional enclosure |
title_full_unstemmed |
Active noise control in three dimensional enclosure |
title_sort |
active noise control in three dimensional enclosure |
publishDate |
2009 |
url |
http://hdl.handle.net/10356/19999 |
_version_ |
1761781260766674944 |