Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)

Active acoustic shielding (AAS) is a system that can attenuate a sound passing through an open window. An AAS is constructed from a number of AAS cells set in an array having an approximately co-located microphone and speaker system. The concept of AAS was previously demonstrated and some simple sim...

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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 2014
Materias:	active acoustic shielding active noise control multiple noise sources moving noise sources multiple filtered-x-lms Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/fa3eaf19eb7d43509113f3e5b28cedd9
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spelling	oai:doaj.org-article:fa3eaf19eb7d43509113f3e5b28cedd92021-11-26T06:14:31ZBasic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)2187-974510.1299/mej.2014eps0065https://doaj.org/article/fa3eaf19eb7d43509113f3e5b28cedd92014-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/6/1_2014eps0065/_pdf/-char/enhttps://doaj.org/toc/2187-9745Active acoustic shielding (AAS) is a system that can attenuate a sound passing through an open window. An AAS is constructed from a number of AAS cells set in an array having an approximately co-located microphone and speaker system. The concept of AAS was previously demonstrated and some simple simulations and experiments were performed. Moreover, an AAS window with four AAS cells was proved to be effective for not only a single stable noise source but also multiple noise sources and moving noise sources. However, the AAS window could only attenuate noise with frequencies from 500Hz to 2 kHz, and could not attenuate noise below 500 Hz, which is dominant in construction sites and daily life. Therefore, in this paper, a new AAS window consisting of two different AAS units in one window is proposed. One of the units attenuates low-frequency sound and the other attenuates high-frequency sound. These units are controlled independently. The new AAS window was fabricated and experimentally evaluated in an anechoic room. It was found that the new AAS window reduced noise by 5 to 15 dB in the frequency range from 300 Hz to 2 kHz over a wide area in the room.Tatsuya MURAOMasaharu NISHIMURAKazunori SAKURAMAShin-ichiro NISHIDAThe Japan Society of Mechanical Engineersarticleactive acoustic shieldingactive noise controlmultiple noise sources moving noise sourcesmultiple filtered-x-lmsMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 6, Pp EPS0065-EPS0065 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	active acoustic shielding active noise control multiple noise sources moving noise sources multiple filtered-x-lms Mechanical engineering and machinery TJ1-1570
spellingShingle	active acoustic shielding active noise control multiple noise sources moving noise sources multiple filtered-x-lms Mechanical engineering and machinery TJ1-1570 Tatsuya MURAO Masaharu NISHIMURA Kazunori SAKURAMA Shin-ichiro NISHIDA Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)
description	Active acoustic shielding (AAS) is a system that can attenuate a sound passing through an open window. An AAS is constructed from a number of AAS cells set in an array having an approximately co-located microphone and speaker system. The concept of AAS was previously demonstrated and some simple simulations and experiments were performed. Moreover, an AAS window with four AAS cells was proved to be effective for not only a single stable noise source but also multiple noise sources and moving noise sources. However, the AAS window could only attenuate noise with frequencies from 500Hz to 2 kHz, and could not attenuate noise below 500 Hz, which is dominant in construction sites and daily life. Therefore, in this paper, a new AAS window consisting of two different AAS units in one window is proposed. One of the units attenuates low-frequency sound and the other attenuates high-frequency sound. These units are controlled independently. The new AAS window was fabricated and experimentally evaluated in an anechoic room. It was found that the new AAS window reduced noise by 5 to 15 dB in the frequency range from 300 Hz to 2 kHz over a wide area in the room.
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 noise-reducing performance in low-frequency range)
title_short	Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)
title_full	Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)
title_fullStr	Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)
title_full_unstemmed	Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)
title_sort	basic study on active acoustic shielding (improving noise-reducing performance in low-frequency range)
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/fa3eaf19eb7d43509113f3e5b28cedd9
work_keys_str_mv	AT tatsuyamurao basicstudyonactiveacousticshieldingimprovingnoisereducingperformanceinlowfrequencyrange AT masaharunishimura basicstudyonactiveacousticshieldingimprovingnoisereducingperformanceinlowfrequencyrange AT kazunorisakurama basicstudyonactiveacousticshieldingimprovingnoisereducingperformanceinlowfrequencyrange AT shinichironishida basicstudyonactiveacousticshieldingimprovingnoisereducingperformanceinlowfrequencyrange
_version_	1718409819339096064

Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)

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