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...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
International Islamic University Malaysia
2011
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/4061/ http://eprints.utem.edu.my/id/eprint/4061/1/IIUM_journal_Azma.pdf |
| _version_ | 1848886987891671040 |
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| author | Putra, Azma Ayob, Md Razali |
| author_facet | Putra, Azma Ayob, Md Razali |
| author_sort | Putra, Azma |
| building | UTeM Institutional Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-15T19:47:14Z |
| format | Article |
| id | utem-4061 |
| institution | Universiti Teknikal Malaysia Melaka |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T19:47:14Z |
| publishDate | 2011 |
| publisher | International Islamic University Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utem-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 |
| 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 |
| title | 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_short | 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 |
| topic | TJ Mechanical engineering and machinery |
| url | http://eprints.utem.edu.my/id/eprint/4061/ http://eprints.utem.edu.my/id/eprint/4061/ http://eprints.utem.edu.my/id/eprint/4061/1/IIUM_journal_Azma.pdf |