Noise and Vibration Pollution: Analytical Analysis of Double-leaf Partition

Abstract

This paper treats the noise control engineering using a double-leaf partition by the means of an analytical approach. This technique is widely used due to its efficiency in providing better acoustic insulation over a wide frequency range compared to single-leaf structures. The double-leaf partition is a construction comprising two leaves separated by an air space or cavity which will dynamically couples the two leaves. Therefore, its analysis is complicated and introduces several scientific aspects This paper deals with a very common case of the double-leaf partitions which is the double glazing: an analytical approach will be used to analyze the influence of the different parameters on the acoustic insulation e.g. plate thickness, gap width, etc.. Several simulations are then performed for different double glazing configurations to assess the influence of the variables on the final acoustic insulation. At low frequencies a better performance was achieved for thicker air layers, while at higher frequencies a thinner air layer is preferable. The use of wall panels with different mass resulted in the wall performing better, particularly for high frequencies.