Adaptive Active Control of Sound Propagation in Rectangular Duct
碩士 === 國立臺灣大學 === 造船工程學系 === 85 === This paper is to discuss the noise reduction in a rectangular duct by using an adaptive active control system. First of all,it analyzes the corresponding acoustic field of a rectangular ductand makes the involved simula...
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1997
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| Online Access: | http://ndltd.ncl.edu.tw/handle/04692367676125015732 |
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ndltd-TW-085NTU003450202016-07-01T04:15:37Z http://ndltd.ncl.edu.tw/handle/04692367676125015732 Adaptive Active Control of Sound Propagation in Rectangular Duct 方形管道聲音傳輸之適應性主動控制 Chen, Ming Wen 陳明文 碩士 國立臺灣大學 造船工程學系 85 This paper is to discuss the noise reduction in a rectangular duct by using an adaptive active control system. First of all,it analyzes the corresponding acoustic field of a rectangular ductand makes the involved simulation in progress. Regarding the required algorithm of control system,a multi- channel LMS oneis adopted.Meanwhile,we use the algorithm to construct the required system andexperiment involved in this study.Also,we use microphones just downstream thenoise source to measure the signal produced by it.In order to reduce the effect of acoustic feedback,a passive noise control system is placed afore in the duct. The result of this study shows that the attenuation of sound intensity level by 20dB are reached for pure-tone sounds below the cut-off frequency corresponding to the second mode. K. T. Chen 陳 國 在 1997 學位論文 ; thesis 95 zh-TW |
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zh-TW |
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碩士 === 國立臺灣大學 === 造船工程學系 === 85 === This paper is to discuss the noise reduction in a
rectangular duct by using an adaptive active control system.
First of all,it analyzes the corresponding acoustic field of a
rectangular ductand makes the involved simulation in progress.
Regarding the required algorithm of control system,a multi-
channel LMS oneis adopted.Meanwhile,we use the algorithm to
construct the required system andexperiment involved in this
study.Also,we use microphones just downstream thenoise source to
measure the signal produced by it.In order to reduce the effect
of acoustic feedback,a passive noise control system is placed
afore in the duct. The result of this study shows that the
attenuation of sound intensity level by 20dB are reached for
pure-tone sounds below the cut-off frequency corresponding to
the second mode.
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| author2 |
K. T. Chen |
| author_facet |
K. T. Chen Chen, Ming Wen 陳明文 |
| author |
Chen, Ming Wen 陳明文 |
| spellingShingle |
Chen, Ming Wen 陳明文 Adaptive Active Control of Sound Propagation in Rectangular Duct |
| author_sort |
Chen, Ming Wen |
| title |
Adaptive Active Control of Sound Propagation in Rectangular Duct |
| title_short |
Adaptive Active Control of Sound Propagation in Rectangular Duct |
| title_full |
Adaptive Active Control of Sound Propagation in Rectangular Duct |
| title_fullStr |
Adaptive Active Control of Sound Propagation in Rectangular Duct |
| title_full_unstemmed |
Adaptive Active Control of Sound Propagation in Rectangular Duct |
| title_sort |
adaptive active control of sound propagation in rectangular duct |
| publishDate |
1997 |
| url |
http://ndltd.ncl.edu.tw/handle/04692367676125015732 |
| work_keys_str_mv |
AT chenmingwen adaptiveactivecontrolofsoundpropagationinrectangularduct AT chénmíngwén adaptiveactivecontrolofsoundpropagationinrectangularduct AT chenmingwen fāngxíngguǎndàoshēngyīnchuánshūzhīshìyīngxìngzhǔdòngkòngzhì AT chénmíngwén fāngxíngguǎndàoshēngyīnchuánshūzhīshìyīngxìngzhǔdòngkòngzhì |
| _version_ |
1718328535228088320 |