Statistical analysis of boundary sound absorption in a panel‐cavity system

Sound absorption due to acoustic‐structural coupling has a significant effect on the acoustical behavior of an enclosed sound field in vibroacoustic systems. In the high‐frequency range, this absorption is related to the average behavior of acoustic and structural modes and a statistical description (e.g., statistical energy analysis) of the coupling and its effect on the sound field response is well known. In both the low‐ and medium‐frequency ranges, acoustic‐structural coupling of low‐order modes tends to dominate and there are large variations in acoustical behavior between acoustic modes. Therefore accurate modal description of the sound field boundary conditions is now important. However, in the medium‐frequency range, the complicated boundary conditions are difficult to describe due to the presence of a large number of dominant acoustic and/or structural modes. Thus acoustic‐structural coupling is not well understood and the physical interpretation of sound absorption in this frequency range is not...