Altering Sound Absorption in Acoustic Fabrics via Different Honeycomb Cell Patterns

Abstract

This study shows the result of experiments carried out with different weave patterns introduced in honeycombed acoustic fabrics by varying the cell patterns. The designed honeycomb fabrics with regular triangular, hexagonal and kagome lattice woven patterns are introduced into acoustic fabrics. Acoustic fabrics have sandwiched and porous layers for absorbing different sound waves that convert sound energy into thermal energy, thus allowing a minimal number of waves to penetrate. The sound absorption of the prepared samples is tested twice by using the microphone transfer function method according to international standard ISO 10534-2. The results show that regular hexagonal weave patterns have higher noise reduction coefficient (NRC) values at high frequency sound waves. At low frequencies, the kagome lattice weave pattern in fibreglass has high NRC values.