Efficient acoustic calculations by the BEM and frequency interpolated transfer functions

Following the demand for more economic and faster algorithms in computational acoustics, a new procedure is developed, which allows the calculation of frequency dependent acoustic transfer functions in a very efficient way. It is based on an indirect boundary element method which is combined with a special source simulation technique. The combination allows a rather accurate and systematic approximation of acoustical results in major parts of the considered frequency range. This leads to a significant reduction of the computer time needed to calculate complete frequency spectra. Two basic examples are shown which demonstrate how the new approach can be used. The procedure turns out to be computationally very powerful and it seems to be a very promising step towards a more efficient calculation of complex sound radiation problems. (C) 2003 Elsevier Ltd. All rights reserved.