A DISCUSSION ON FINITE ELEMENTAL ANALYSIS OF SOUND FIELD IN ROOMS WITH SOUND ABSORBING MATERIALS

In the analysis of architectural acoustics, the transient response in the three dimensional room with absorbent walls is essential important. Then, several approaches are i presented here to treat the dissi ation and to o tin the transient response efficiently. Although the finite element meth 0$ requires more memory in a computer compared to that of the boundary element method, the finite element method has stronger points in some cases. However, some physical assure tions and some mathematical considerations help to reduce the required memory, which m$ es a way to such an analysis as is on an auditorium. So, the choice of the combination of them is essential, especially in the analysis on a huge system. To make the point clearer, several computations are carried out. With the results, the characteristics of them are discussed.