Time-domain estimation of acoustic radiation modes and active structural acoustic control

This paper presents a method of calculating the radiated sound power of vibrating structures based on the time domain estimation of acoustic radiation modes (ARMs). Each ARM is frequency-dependent, radiates power independent of the other ARMs and can be estimated in the time domain from measurements...

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Main Authors:	Md Nor, Khairul Affendy, Mace, Brian R., Hioka, Yusuke
Format:	Conference or Workshop Item
Language:	English English
Published:	Australian Acoustical Society 2016
Subjects:	TA365 Acoustics in engineering. Acoustical engineering
Online Access:	http://irep.iium.edu.my/72878/ http://irep.iium.edu.my/72878/ http://irep.iium.edu.my/72878/9/72878_Time-domain%20estimation%20of%20acoustic%20_complete.pdf http://irep.iium.edu.my/72878/2/72878_Time-domain%20estimation%20of%20acoustic%20radiation_SCOPUS.pdf

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recordtype	eprints
spelling	iium-728782019-09-12T07:39:17Z http://irep.iium.edu.my/72878/ Time-domain estimation of acoustic radiation modes and active structural acoustic control Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke TA365 Acoustics in engineering. Acoustical engineering This paper presents a method of calculating the radiated sound power of vibrating structures based on the time domain estimation of acoustic radiation modes (ARMs). Each ARM is frequency-dependent, radiates power independent of the other ARMs and can be estimated in the time domain from measurements made at discrete sensor locations on the surface of the radiating structure. The individual ARM components are estimated digitally in the time domain using finite impulse response filters, which are designed to provide a best weighted fit to the ARMs in the frequency domain. The ARM amplitudes are estimated by filtering the vectors of measured velocities at points on the radiating surface with these ARM filters, before summing the product of the square of these amplitudes with the relevant eigenvalues to estimate the radiated sound power. The method is described with reference to a simply supported beam model. The results show that the sound power calculated from the proposed approach and from a frequency domain approach are comparable. Finally, a time domain feedforward active structural acoustic control system developed using the proposed method is presented and time domain simulations demonstrate the performance of the system. Australian Acoustical Society 2016 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/72878/9/72878_Time-domain%20estimation%20of%20acoustic%20_complete.pdf application/pdf en http://irep.iium.edu.my/72878/2/72878_Time-domain%20estimation%20of%20acoustic%20radiation_SCOPUS.pdf Md Nor, Khairul Affendy and Mace, Brian R. and Hioka, Yusuke (2016) Time-domain estimation of acoustic radiation modes and active structural acoustic control. In: 2nd Australasian Acoustical Societies Conference, ACOUSTICS 2016, 9th-11th November 2016, Brisbane, Australia. https://www.acoustics.asn.au/conference_proceedings/AASNZ2016/
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TA365 Acoustics in engineering. Acoustical engineering
spellingShingle	TA365 Acoustics in engineering. Acoustical engineering Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke Time-domain estimation of acoustic radiation modes and active structural acoustic control
description	This paper presents a method of calculating the radiated sound power of vibrating structures based on the time domain estimation of acoustic radiation modes (ARMs). Each ARM is frequency-dependent, radiates power independent of the other ARMs and can be estimated in the time domain from measurements made at discrete sensor locations on the surface of the radiating structure. The individual ARM components are estimated digitally in the time domain using finite impulse response filters, which are designed to provide a best weighted fit to the ARMs in the frequency domain. The ARM amplitudes are estimated by filtering the vectors of measured velocities at points on the radiating surface with these ARM filters, before summing the product of the square of these amplitudes with the relevant eigenvalues to estimate the radiated sound power. The method is described with reference to a simply supported beam model. The results show that the sound power calculated from the proposed approach and from a frequency domain approach are comparable. Finally, a time domain feedforward active structural acoustic control system developed using the proposed method is presented and time domain simulations demonstrate the performance of the system.
format	Conference or Workshop Item
author	Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke
author_facet	Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke
author_sort	Md Nor, Khairul Affendy
title	Time-domain estimation of acoustic radiation modes and active structural acoustic control
title_short	Time-domain estimation of acoustic radiation modes and active structural acoustic control
title_full	Time-domain estimation of acoustic radiation modes and active structural acoustic control
title_fullStr	Time-domain estimation of acoustic radiation modes and active structural acoustic control
title_full_unstemmed	Time-domain estimation of acoustic radiation modes and active structural acoustic control
title_sort	time-domain estimation of acoustic radiation modes and active structural acoustic control
publisher	Australian Acoustical Society
publishDate	2016
url	http://irep.iium.edu.my/72878/ http://irep.iium.edu.my/72878/ http://irep.iium.edu.my/72878/9/72878_Time-domain%20estimation%20of%20acoustic%20_complete.pdf http://irep.iium.edu.my/72878/2/72878_Time-domain%20estimation%20of%20acoustic%20radiation_SCOPUS.pdf
first_indexed	2023-09-18T21:43:20Z
last_indexed	2023-09-18T21:43:20Z
_version_	1777413285553897472

Time-domain estimation of acoustic radiation modes and active structural acoustic control

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