Sound insulation property of three-dimensional spacer fabric composites

Three-dimensional composites with different pile height, face-sheet thickness and pile structure have been manufactured in order to study the relationship between the sound insulation properties and the structures of the 3D composites. Methods of reverberation-anechoic chambers are used to study the sound insulation property. The results show that three-dimensional spacer fabric composites have excellent sound insulation properties. The sound insulation property increases with the increase in pile height and face-sheet thickness. The sound insulation property of the '8'-shaped pile structures is found to be better than that of '88'-shaped structure. The results would offer important guidance function on structure optimization and property analysis of three-dimensional spacer fabric composites.