Comparison of Static Wave Ratio and transfer Function Method in Determining the Sound Absorption Coefficient of Materials

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GOLMOHAMMADI ROSTAM; OLIAEI MOHAMMAD; ALIABADI MOHSEN; SHAHIDI REZA; Orvati Movafagh Mostafa

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Journal: JOURNAL OF OCCUPATIONAL HYGIENE ENGINEERING Year:2018 | Volume:5 | Issue:2 Page(s): 1-11

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Title

Comparison of Static Wave Ratio and transfer Function Method in Determining the Sound Absorption Coefficient of Materials

Author(s)

Keywords

Acoustic MaterialsQ1

Impedance TubeQ1

Static Wave RatioQ1

Sound Absorption CoefficientQ1

Transfer FunctionQ1

Abstract

Background and Objective: Sound Absorption Coefficient determination is an important factor in selecting the proper materials to control indoor noise. Therefore, this study aimed to compare the results of Sound Absorption Coefficient of different materials by standing wave ratio and Transfer Function method, as well as developing a regression model in adjusting the provided results. Materials and Methods: The current study was conducted on 46 Acoustic Materials. In order to measure the absorption coefficient of different materials, two instruments called the Impedance Tube (model 9410, AvaSina, Iran) and the Impedance Tube (model SW 260, BSWA, USA) in compliance with ISO 10534-2 in the frequency range of 125 to 2000 Hz were utilized. Results: The obtained results from the regression model revealed that frequency of 500 Hz has the highest correlation (r=0. 968, R2=0. 936), and the lowest correlation coefficient was found at 125 Hz (r=0. 368, R2=0. 136). In addition, the correlation coefficient of NRC was 0. 829. Conclusion: The results showed that the two methods were consistant at the frequencies of 250, 500, 1000 and 2000 Hz. It can be concluded that the standing wave ratio method is a reliable approach in determining Sound Absorption Coefficient of Acoustic Materials.

Cites

Evaluation of Environmental Noise Control at a Press Workshop of a Metal Structure Factory using the ISO 11690 Method

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APA: Copy

GOLMOHAMMADI, ROSTAM, OLIAEI, MOHAMMAD, ALIABADI, MOHSEN, SHAHIDI, REZA, & Orvati Movafagh, Mostafa. (2018). Comparison of Static Wave Ratio and transfer Function Method in Determining the Sound Absorption Coefficient of Materials. JOURNAL OF OCCUPATIONAL HYGIENE ENGINEERING, 5(2 ), 1-11. SID. https://sid.ir/paper/253413/en

Vancouver: Copy

GOLMOHAMMADI ROSTAM, OLIAEI MOHAMMAD, ALIABADI MOHSEN, SHAHIDI REZA, Orvati Movafagh Mostafa. Comparison of Static Wave Ratio and transfer Function Method in Determining the Sound Absorption Coefficient of Materials. JOURNAL OF OCCUPATIONAL HYGIENE ENGINEERING[Internet]. 2018;5(2 ):1-11. Available from: https://sid.ir/paper/253413/en

IEEE: Copy

ROSTAM GOLMOHAMMADI, MOHAMMAD OLIAEI, MOHSEN ALIABADI, REZA SHAHIDI, and Mostafa Orvati Movafagh, “Comparison of Static Wave Ratio and transfer Function Method in Determining the Sound Absorption Coefficient of Materials,” JOURNAL OF OCCUPATIONAL HYGIENE ENGINEERING, vol. 5, no. 2 , pp. 1–11, 2018, [Online]. Available: https://sid.ir/paper/253413/en

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