acoustic absorption meterial的用法和样例：
- A unit of acoustic absorption equivalent to the absorption by one square foot of a surface that absorbs all incident sound.
- The noise-deadening property was also analyzed and pointed that it was a new composite material which has much high performance such as excellent noise-deadening and acoustic absorption etc.
- Based on the viscosity acoustic absorption theory, Rock material is natural low-pass filter of acoustical wave.
- Acoustic absorption coefficient of wood