Abstract
Predicting high frequency sound field in a cabin by using numerical analysis is essential for efficient acoustic design of noise reduction, but is difficult because it's a large scale problem of large number of elements. In this paper, fast multipole boundary element method (FMBEM) which has been developed as technique to reduce the computational time for large scale problems is applied to simulation of sound field in a simplified cabin model. And effect of the shape of sound field and the number of elements in a cell at the lowest level on computational time is examined.
