Abstract
When the sound source or the evaluation point moves in the virtual reality, the sound pressure at the evaluation point can be calculated by interpolating every changing transfer function at each time. In this study, a new method to calculate the sound pressure at the frequency domain is proposed. This method can be reduced the calculation amount of the inverse Fourier transformation. In addition, a new method to separate the reflection sound and the direct sound from the impulse response is also proposed. This method uses the difference of the time lag of those sounds between two evaluation points. Therefore, the accuracy of the method is free from the frequency characteristic of reflective surface.
