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Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading

The micro-perforated panel (MPP) is recently well-known as an alternative ‘green‘ sound absorber replacing the conventional porous materials. Constructed from a solid panel which provides a non-abrassive structure and also an optically attractive surface, there gives a feasibility to implement such...

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Main Authors: Putra, Azma, Ayob, Md Razali
Format: Article
Language:English
Published: International Islamic University Malaysia 2011
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utem.edu.my/id/eprint/4061/1/IIUM_journal_Azma.pdf
http://eprints.utem.edu.my/id/eprint/4061/
http://www.iium.edu.my/ejournal/index.php/iiumej
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spelling my.utem.eprints.40612021-12-24T17:00:31Z http://eprints.utem.edu.my/id/eprint/4061/ Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading Putra, Azma Ayob, Md Razali TJ Mechanical engineering and machinery The micro-perforated panel (MPP) is recently well-known as an alternative ‘green‘ sound absorber replacing the conventional porous materials. Constructed from a solid panel which provides a non-abrassive structure and also an optically attractive surface, there gives a feasibility to implement such a panel inside a vehicle cabin. This paper is the preliminary study to investigate the sound transmission loss (TL) of a solid panel coupled with a micro-perforated panel to form a doube-leaf partition which is already known as a lightweigth stucture for noise insulation in vehicles and buildings. The mathematical model for the TL subjected to normal incidence of acoustic excitation is derived. The results show that its performance substantially improves at the troublesome frequency of mass-air-mass resonance which occurs in the conventional double-leaf solid partition. This is important particularly for the noise source predominant at low frequencies. This can also be controlled by tuning the hole size and number as well as the air gap between the panels. International Islamic University Malaysia 2011 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/4061/1/IIUM_journal_Azma.pdf Putra, Azma and Ayob, Md Razali (2011) Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading. IIUM Engineering Journal, Special Issue in Mechanical Engineering, 12 (3). pp. 162-174. ISSN 1511-788X http://www.iium.edu.my/ejournal/index.php/iiumej
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Putra, Azma
Ayob, Md Razali
Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading
description The micro-perforated panel (MPP) is recently well-known as an alternative ‘green‘ sound absorber replacing the conventional porous materials. Constructed from a solid panel which provides a non-abrassive structure and also an optically attractive surface, there gives a feasibility to implement such a panel inside a vehicle cabin. This paper is the preliminary study to investigate the sound transmission loss (TL) of a solid panel coupled with a micro-perforated panel to form a doube-leaf partition which is already known as a lightweigth stucture for noise insulation in vehicles and buildings. The mathematical model for the TL subjected to normal incidence of acoustic excitation is derived. The results show that its performance substantially improves at the troublesome frequency of mass-air-mass resonance which occurs in the conventional double-leaf solid partition. This is important particularly for the noise source predominant at low frequencies. This can also be controlled by tuning the hole size and number as well as the air gap between the panels.
format Article
author Putra, Azma
Ayob, Md Razali
author_facet Putra, Azma
Ayob, Md Razali
author_sort Putra, Azma
title Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading
title_short Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading
title_full Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading
title_fullStr Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading
title_full_unstemmed Sound Transmission Loss of a Double-Leaf Solid-Microperforated Partition Under Normal Incidence of Acoustic Loading
title_sort sound transmission loss of a double-leaf solid-microperforated partition under normal incidence of acoustic loading
publisher International Islamic University Malaysia
publishDate 2011
url http://eprints.utem.edu.my/id/eprint/4061/1/IIUM_journal_Azma.pdf
http://eprints.utem.edu.my/id/eprint/4061/
http://www.iium.edu.my/ejournal/index.php/iiumej
_version_ 1720440246625107968
score 13.211869

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