A Comparative Study on the Effect of Air Gap on Sound Transmission Loss Provided by Double Glazed Panels

Abstract:

This paper presents an assessment for the airborne sound insulation provided by double glazed panels. The glazed panels were glass, acrylic and polycarbonate with a thickness of 4 mm. The panels were tested for 10 mm, 20 mm and 30 mm air gap thicknesses. The experiments were conducted in a transmission loss facility consisting of semi anechoic and reverberation chambers complying with International Standards ISO 140-1 and ISO 140-3. The panels were subjected to airborne sound. Glass, acrylic and polycarbonate panel absorb noise most effectively above 500 Hz with the absorption peaks at 1000 Hz. The single number sound reduction index (R_W) for glass, acrylic and polycarbonate as double layers with air gap were evaluated. The results showed that the glass has higher R_W for all air gaps and the results were 40.5 dB, 37.7 dB and 37.4 dB, respectively. This could be attributed mainly to the material density which is higher for the glass.

• Periodical: Applied Mechanics and Materials (Volume 165)
• Pages: 242-246
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.165.242
• Online since: April 2012
• Authors: Zambri Harun, Elwaleed Awad, Mohd Jailani Mohd Nor, Muhamad Razi
• Keywords: Double Panel, Transmission Loss, Weighted Sound Reduction Index

References

[1] Q. Mao and S. Pietrzko: Applied Acoustics Vol. 71 (2010), p.32.

[2] B. Naticchia and A. Carbonari: Building and Environment Vol. 42 (2007), p.2785.

[3] A. Tadeu, A. Pereira., L. Godinho and J. Antonio: Applied Acoustics Vol. 68 (2007), p.17.

[4] H. Yu, G. Yao, X. Wang, B. Li, Y. Yin and K. Liu: Transactions of Nonferrous Metals Society of China Vol. 17 (2007), p.93.

[5] J.D. Irwin and E.R. Graf: Industrial Noise and Vibration Control (Prentice-Hall, New Jersey 1979).

[6] A. Tadeu, J. Antonio and D. Mateus: Applied Acoustics Vol. 65 (2004), p.15.