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In this paper, we investigate the effect of the number and stacking sequence of membranes in different glass fiber felts and their corresponding composite structures (bilayer structure and sandwich structure) on acoustic properties. Sound absorption coefficient (SAC) and sound transmission loss (STL) are measured by a B&K impedance tube. The results show that, with the increase the number of membranes...
Glass fiber felt has emerged as a popular material for noise reduction. In this paper, glass fiber felt is produced by flame blowing process. Fiber distribution, microstructure, permeation rate and sound transmission loss (STL) are explored. The results show that, the internal and cross-sectional structures of glass fiber felt are disordered and micro-layer, respectively. There is a directly proportional...
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