Volume 9, Issue 2 (Summer 2022)                   johe 2022, 9(2): 88-94 | Back to browse issues page

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Ali Mohammadi I, Nouraei M, Vosoughi S, Esrafili Dizgi A, Abolghasemi J. Experimental Investigation of Sound Transmission Loss in Double-Glazing Filled with Hydrogel. johe 2022; 9 (2) :88-94
URL: http://johe.umsha.ac.ir/article-1-817-en.html
1- Occupational Health Research Center, Department of Occupational Health Engineering, School of Public Health, Iran University of Medical Sciences
2- Occupational Health Research Center, Department of Occupational Health Engineering, School of Public Health, Iran University of Medical Sciences , mozhgan.nuraei@gmail.com
3- Research Center for Environmental Health Technology, Department of Environmental Health Engineering, Iran University of Medical Sciences
4- Department of Epidemiology and Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
Abstract:   (1652 Views)
Background and Objective: Double-glazing is one of the methods of sound control. The use of materials other than gas inside double-glazing can develop sound transmission loss. The present study aims to make a double-glazing filled with A200 hydrogel at different ratios and measure the sound transmission loss.
Materials and Methods: In the present study, 4 samples of double-glazing were made with water and A200 hydrogel. The mixing ratios of hydrogel with water were 1:20, 1:75, and 1: 150. The sound transmission loss of each sample was measured three times by AvaSina impedance tube using the sound pressure level through two microphones installed on both sides of the sample according to ISO 10534-1. Then, the results were analyzed by SPSS software (version 24) and repeated measures test.
Results: According to the results, the highest amount of sound transmission loss was related to the water sample at 250 and 500 Hz and the A200-1:20 sample at 1000 and 2000 Hz. Meanwhile, the A200-1:75 sample had the lowest sound transmission loss at 250, 500, and 1000 Hz, and the water sample at 2000 Hz.
Conclusion: The present study indicated that filling empty space of double-glazing with hydrogel increases transmission loss in high frequencies and decreases it in low frequencies compared to that of the water sample. Also, transmission loss of the air sample was found significantly different from all other samples except the A200-1:150 sample by comparing the water and hydrogel samples with the air sample as a control.
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Type of Study: Research Article | Subject: Physical agents

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