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The acoustical properties of fiber materials are mainly determined by the air flow resistivity. In this paper a model for calculating the air flow resistivity of glass fiber felt is presented. According to this model the air flow resistivity depends on the mean spacing of the fibers, the amount of resin bonding and the physical properties of air. Expressions for predicting the air flow resistivity...
This paper focuses on three types of glass fiber felt sandwich structures to identify the optimal sound insulation structure. Air flow resistivities of glass fiber felts are 6633 Pa·s/m 2 (Loose), 19579 Pa·s/m 2 (Mid) and 42724 Pa·s/m 2 (Dense), respectively. The three types of sandwich structures are dense-mid-loose (DML), mid-loose-dense (MLD) and loose-dense-mid...
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