Theoretical analysis of the acoustical characteristics of suspended micro-perforated panel

Sound absorption characteristics of suspended micro-perforated panel are theoretically investigated in this paper. The method of half thickness model of the absorber with quadripole analysis was used for predicting its acoustic performance. Predictions show that they well agreed with the absorption measurements in the reverberation chamber. This paper further discusses the factors affected the absorption characteristics for such absorbers, and suggests some rules as design guidelines.