Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)

In this paper, the M[(1-1)-L’] FXLMS algorithm is shown to be useful in enlarging the window size for Active Acoustic Shielding (AAS) window. AAS is a system that can attenuate sound passing through an open window. In our previous study, an AAS window was fabricated with 4 AAS cells, each of which c...

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Autores principales:	Tatsuya MURAO, Masaharu NISHIMURA, Kazunori SAKURAMA, Shin-ichiro NISHIDA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	active noise control active acoustic shielding multiple filtered-x-lms decentralized system Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/d52f7d983e694371b966cdfcd1351735
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spelling	oai:doaj.org-article:d52f7d983e694371b966cdfcd13517352021-11-26T06:35:12ZBasic study on active acoustic shielding (Improving the method to enlarge the AAS window)2187-974510.1299/mej.15-00322https://doaj.org/article/d52f7d983e694371b966cdfcd13517352016-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/1/3_15-00322/_pdf/-char/enhttps://doaj.org/toc/2187-9745In this paper, the M[(1-1)-L’] FXLMS algorithm is shown to be useful in enlarging the window size for Active Acoustic Shielding (AAS) window. AAS is a system that can attenuate sound passing through an open window. In our previous study, an AAS window was fabricated with 4 AAS cells, each of which consisted of an collocated microphone and speaker. This AAS window was proved to be effective for not only single stable noise sources but also multiple and moving noise sources. The AAS system consists of many AAS cells set in an array. However, the size of the existing type AAS window is only 250mm square. Therefore in this paper, we propose the M[(1-1)-L’] FXLMS algorithm (M: number of AAS systems, L’ : number of error signals used for controlling 1 AAS cell) for controlling a larger window and a larger number of AAS cells. This algorithm is a similar to FXLMS algorithm, as each AAS cell is individually controlled by its own reference and neighboring error sensors. Six AAS cells are fixed on a rectangular window (125 × 750mm square) and controlled using 6 [(1-1)-3’ ] FXLMS. This system proved useful in controlling large number of AAS cells. In this study a simulator of the M[(1-1)-L’] FXLMS algorithm is constructed. The simulation results from the 6 [(1-1)-3’] FXLMS algorithms coincided well with the experimental results of 6 [(1-1)-3’ ] FXLMS, which suggests that a large AAS window is feasible.Tatsuya MURAOMasaharu NISHIMURAKazunori SAKURAMAShin-ichiro NISHIDAThe Japan Society of Mechanical Engineersarticleactive noise controlactive acoustic shieldingmultiple filtered-x-lmsdecentralized systemMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 1, Pp 15-00322-15-00322 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	active noise control active acoustic shielding multiple filtered-x-lms decentralized system Mechanical engineering and machinery TJ1-1570
spellingShingle	active noise control active acoustic shielding multiple filtered-x-lms decentralized system Mechanical engineering and machinery TJ1-1570 Tatsuya MURAO Masaharu NISHIMURA Kazunori SAKURAMA Shin-ichiro NISHIDA Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)
description	In this paper, the M[(1-1)-L’] FXLMS algorithm is shown to be useful in enlarging the window size for Active Acoustic Shielding (AAS) window. AAS is a system that can attenuate sound passing through an open window. In our previous study, an AAS window was fabricated with 4 AAS cells, each of which consisted of an collocated microphone and speaker. This AAS window was proved to be effective for not only single stable noise sources but also multiple and moving noise sources. The AAS system consists of many AAS cells set in an array. However, the size of the existing type AAS window is only 250mm square. Therefore in this paper, we propose the M[(1-1)-L’] FXLMS algorithm (M: number of AAS systems, L’ : number of error signals used for controlling 1 AAS cell) for controlling a larger window and a larger number of AAS cells. This algorithm is a similar to FXLMS algorithm, as each AAS cell is individually controlled by its own reference and neighboring error sensors. Six AAS cells are fixed on a rectangular window (125 × 750mm square) and controlled using 6 [(1-1)-3’ ] FXLMS. This system proved useful in controlling large number of AAS cells. In this study a simulator of the M[(1-1)-L’] FXLMS algorithm is constructed. The simulation results from the 6 [(1-1)-3’] FXLMS algorithms coincided well with the experimental results of 6 [(1-1)-3’ ] FXLMS, which suggests that a large AAS window is feasible.
format	article
author	Tatsuya MURAO Masaharu NISHIMURA Kazunori SAKURAMA Shin-ichiro NISHIDA
author_facet	Tatsuya MURAO Masaharu NISHIMURA Kazunori SAKURAMA Shin-ichiro NISHIDA
author_sort	Tatsuya MURAO
title	Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)
title_short	Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)
title_full	Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)
title_fullStr	Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)
title_full_unstemmed	Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)
title_sort	basic study on active acoustic shielding (improving the method to enlarge the aas window)
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/d52f7d983e694371b966cdfcd1351735
work_keys_str_mv	AT tatsuyamurao basicstudyonactiveacousticshieldingimprovingthemethodtoenlargetheaaswindow AT masaharunishimura basicstudyonactiveacousticshieldingimprovingthemethodtoenlargetheaaswindow AT kazunorisakurama basicstudyonactiveacousticshieldingimprovingthemethodtoenlargetheaaswindow AT shinichironishida basicstudyonactiveacousticshieldingimprovingthemethodtoenlargetheaaswindow
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Basic study on active acoustic shielding (Improving the method to enlarge the AAS window)

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