Modelling of Woven Fabric as Micro Perforated Panel as Sound Absorber

Abstract

Woven fabrics have a micro perforation created by warp and weft yarn in x and y direction. A micro perforation in the stucture of woven fabric creates a viscos-inertial thermal effect as a basis of sound absorber. In this study, the focus is to determine diameter, space and ratio of perforation that is used in modelling of the twill woven fabric as Microperforated Panel (MPP) absorber. Maa model is used as basis for modelling. For further investigation, the geometrical properties are characterized using a digital microscope. The sound absorption coefficients are measured by an impedance tube using transfer function method. The prediction model is validated by experiment. It can be concluded that the behavior of sound absorber for certain woven fabric can be determined by the model.