Generally speaking soft porous materials will be more absorptive than hard reflective surfaces.
Absorption coefficient of hardwood.
Hardwood burning was identified as the dominant source of carbonaceous aerosols.
In general when sound waves strike on the surface of porous materials sound energy could get channelized as.
Sound absorption properties of wood have a close relationship with their micropores structure and gas permeability.
Absorption coefficients are an average of how absorptive each product is at numerous frequencies generally at 500 hz 1000 hz and 2000 hz.
Absorption transmission and reflection.
Slotted wood panels can be used on walls or ceilings to reduce the noise and echo within a room or building.
Sound absorption coefficient greater than 1 01 sound absorption coefficient greater than 1 02.
For hackberry hardwood species the better sound absorption coefficient is identified in a wide frequency range of 2 khz 6 khz due to the presence of more pores and larger passageway.
The measured aerosol absorption ångström exponent aae at 370 880 nm aae 370 880nm was 1 71 0 24.