Sound absorption properties at high sound frequency of open cell aluminium foam / Mohd Arifhakim Azizan...[et al.]

Azizan, Mohd Arifhakim and Ismail, Muhammad Hussain and Mohd Salleh, Noor Azlina and Natarajan, David Valliyappan (2017) Sound absorption properties at high sound frequency of open cell aluminium foam / Mohd Arifhakim Azizan...[et al.]. Journal of Mechanical Engineering (JMechE), SI 2 (1). pp. 161-173. ISSN 1823-5514 ; 2550-164X


Open-cell aluminium foam is a type of metallic foam that has been industrialised years ago. It has been found that due to its porous characteristic, it is suitable for sound absorption. The porous characteristic of open-cell aluminium foam is closely related to its sound absorption properties. In this research, the open-cell aluminium foam was produced by infiltration casting method and its sound absorption properties were studied. Infiltration casting is a casting method that uses space holder material in the casting mould and later the mould is infiltrated with molten material by vacuuming and gas purging inside the mould. NaCl was used as the space holder material in order to form the porous structure. The size of NaCl grains is in the range between 1mm to 3 mm. The surface structure of the fabricated open-cell aluminium foam was then observed under an optical microscope while its sound absorption properties were determined using impedance tube test, respected to the ASTM E1050 designation to analyse sound absorption coefficient. It was found that at high sound frequency ranging from 800 Hz to 5000 Hz, open-cell aluminium foam produced from infiltration method gave a higher sound absorption for bigger pore open-cell aluminium foam.


Item Type: Article
Email / ID Num.
Azizan, Mohd Arifhakim
Ismail, Muhammad Hussain
Mohd Salleh, Noor Azlina
Natarajan, David Valliyappan
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
UiTM Journal Collections: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 1823-5514 ; 2550-164X
Volume: SI 2
Number: 1
Page Range: pp. 161-173
Keywords: Open-Cell Aluminium Foam, Sound Absorption, High Frequency
Date: 2017
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