Fig. 5: Outstanding sound absorption performance of the composite foam with triboelectric effects over common acoustic absorbing products.
From: Mechanism of airborne sound absorption through triboelectric effect for noise mitigation
a Distribution of NRC of acoustic absorbers with triboelectric effect. The dots represent NRC values of acoustic absorber samples with different types and varying absorber thickness. Despite the reduced thickness, triboelectric-enabled absorbers surpass acoustic absorbers made of single materials, composite materials, or layered structures. b NRCs of acoustic absorbers with triboelectric effect outperform other groups without. c Sound absorption coefficient of PU-based TEC foam shows higher sound absorption over its commercial counterpart. d Superior performance of PU-based TEC foam in comparison with a variety of commonly used commercial products.
