Volume 3, Issue 3 (Autumn 2016)                   johe 2016, 3(3): 32-39 | Back to browse issues page

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Aliabadi M, Golmohammadi R, Oliae M, Shahidi R. Study of noise absorption characteristics for current building materials applied in industrial and office rooms . johe 2016; 3 (3) :32-39
URL: http://johe.umsha.ac.ir/article-1-246-en.html
Study of noise absorption characteristics for current building materials applied in industrial and office rooms
Mohsen Aliabadi * 1, Rostam Golmohammadi2 , Mohammad Oliae2 , Reza Shahidi
1- Hamadan University of Medical Sciences , Mohsen.aliabadi@umsha.ac.ir
2- Hamadan University of Medical Sciences
Abstract:   (8043 Views)

Introduction: In Iran country, there is a lack of reliable data on acoustic characteristics of building materials applied in the offices and industrial rooms. This study aimed to investigate noise absorption characteristics for current building and acoustics materials and provided the acoustic database.

Method:  In this cross sectional study, the minimum of 60 building and acoustic materials were tested in the acoustics laboratory located in the school of health. Measuring the absorption coefficient was performed using the Impedance Tube (SW60, BSWA) along with 1/4’’ Microphone (MPA416) and power amplifier (PA50) in frequency range from 125 to 6300 Hz according to ISO10534-2. The data was analyzed using Excel 2013 software.

Results: The results of the sound absorption coefficients for different types of materials were presented based on octave band. The results showed that the increase of sound absorptions by rising the thickness of the chemical foams. The highest absorptions were observed in the medium and high frequencies. However, the impact of materials density on the increase of sound absorption is inconsiderable compared with materials thickness. In view point of sound absorption, the polyurethane foams have better performance than the polyethylene foams.

Conclusion: Based on the obtained acoustics database, acoustics professionals can conducted more reliable evaluation about acoustic condition of residential, industrial and office rooms in the design and operation phases. The results confirmed that, material thickness is one of the main features affecting sound absorption especially for high efficiency absorbents like chemical foam. 

Keywords: Sound absorption coefficients, Acoustic material, Building material, Impedance tube
Full-Text [PDF 471 kb]   (14746 Downloads)    
Type of Study: Research Article | Subject: Physical agents
References
1. Concha-Barrientos M, Campbell-Lendrum D, Steenlan K. Occupational Noise, World Health Organization, Protection of the Human Environment, Geneva, Environmental Burden of Disease Series, 2004; No 9.
2. Gholami T, Piran veyseh P, Aliabadi M, Farhadian M. Study of noise pollution and its effects on subjective fatigue of staff in the governmental banks of Hamadan city. Iran Occupational Health, 2014; 11 (5) :65-73.
3. Aliabadi M Rostam Golmohammadi R, Mansoorizadeh M. Objective approach for analysis of noise source characteristics and acoustic conditions in noisy computerized embroidery workrooms. Environ Monit Assess (2014) 186:1855–1864. [DOI:10.1007/s10661-013-3499-2] [PMID]
4. Bell LH, Bell DH. Industrial Noise Control, Second Edition, New York, Marcel Dekkel, 1994.
5. Cox TJ, Antoni. P.D. Acoustic absorbers and diffusers. Theory, design and application. Third Edition, Spon Press, 2004.
6. Barron RF. Industrial noise control and acoustics. New York: Marcel Dekker Inc; 2001.
7. ISO EN 12354-6. Building Acoustics - Estimation of acoustic performance of buildings from the performance of elements - Part 6: Sound absorption in enclosed spaces. Geneva: International Standard Organization; 2003.
8. McGrory M, Daniel Castro Cirac D, Gaussen O, Cabrera D. Sound absorption coefficient measurement: Re-examining the relationship between impedance tube and reverberant room methods. Proceedings of Acoustics – Fremantle 21-23 November 2012, Fremantle, Australia, 2012.
9. Forouharmajd F, Mohammadi Z. The feasibility of using impedance tube with two microphones and sound absorption coefficient measurement of iranian-made materials using transfer function method. J Health Syst Res 2016; 12(1): 119-24.
10. Golmohammadi, R, Olyaie M, Samavat H, Motamedzade M. producing of impedance tube for measurement of acoustic absorption coefficient of some sound absorber materials. Scientific Journal of Hamadan University of Medical Sciences 2008; 15(1):55-61.
11. ISO 10534-1. Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes-Part 1: Method using standing wave ratio. Geneva: International Standard Organization; 2001.
12. ISO 10534-2 .Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes-Part 2: Transfer-function method. Geneva: International Standard Organization; 2001.
13. Suhanek M, Jambrosic K, Domitrovic H. Student project of building an impedance tube", Acoustics'08 Paris, Paris, France, June 2008.
14. Hasan K. An assessment of the performance of impedance tube method Source. Noise Control Engineering Journal. 2014; 62(4):264-274. [DOI:10.3397/1/376226]
15. Suhanek, M. Jambrosic, K. ; Horvat, M. A comparison of two methods for measuring the sound absorption coefficient using impedance tubes. ELMAR 50th International Symposium, Zadar, 2008.
16. Seddeq H.S. Factors influencing acoustic performance of sound absorptive materials. Australian Journal of Basic and Applied Sciences, 2009; 3(4): 4610-4617.
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