抄録
The wavelets are applied to the time-domain boundary element method for solving the 2-D scalar wave equation. In the present method, the wavelets are used for approximating the unknowns on boundary, and for Galerkin discretization. Most of the coefficient matrix entries are small due to the vanishing moment property of the wavelets. The truncation of the small entries contributes to generate the sparse coefficient matrices. The use of wavelets, in particular, enables us to reduce the number of the matrix entries required to calculation of time convolution. However, the threshold for the truncation should be determined in consideration of the accuracy of the approximate solutions.
