Manufacturing Technology 2019, 19(1):156-160 | DOI: 10.21062/ujep/261.2019/a/1213-2489/MT/19/1/156

A Study of Factors Influencing Sound Absorption Properties of Porous Materials

Martin Vašina1, Lumír Hružík1, Adam Bureček1, Miroslav Mahdal1, Katarína Monková2, Peter Pavol Monka2
1 Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba. Czech Republic
2 Faculty of Manufacturing Technologies, Technical University of Košice, Štúrova 31, 080 01 Prešov. Slovakia

A big accent is put on environmental protection at the present time. Noise belongs in general to negative factors of our environment. For this reason, it is necessary to perform suitable measures in order to eliminate noise. For example, it is possible to apply sound absorbers in order to damp noise. Materials with porous, spongy and fibrous structure belong generally to suitable materials in terms of noise damping. The aim of the paper is to investigate sound absorption properties of different types of porous materials. Frequency dependencies of the sound absorption coefficient over a frequency range of 150-6400 Hz were determined by the transfer function method using the acoustic impedance tube. Different factors, that have influence on sound absorption of the investigated porous materials, were studied in this paper. It can be concluded that sound absorption properties of the tested porous materials are significantly influenced by material structure and thickness, excitation frequency and air gap size behind the investigated samples.

Keywords: Sound Absorption Coefficient, Excitation Frequency, Air Gap, Thickness, Material Structure
Grants and funding:

European Regional Development Fund in the Research Centre of Advanced Mechatronic Systems project, project number  CZ.02.1.01/0.0/0.0/16_019/0000867.
Operational Programme Research, Development and Education and by the Ministry of Education of SR with the project KEGA 007TUKE-4/2018.

Published: February 1, 2019  Show citation

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Vašina M, Hružík L, Bureček A, Mahdal M, Monková K, Monka PP. A Study of Factors Influencing Sound Absorption Properties of Porous Materials. Manufacturing Technology. 2019;19(1):156-160. doi: 10.21062/ujep/261.2019/a/1213-2489/MT/19/1/156.
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