Impulse response data generating method for sound field simulation

摘要

PPROBLEM TO BE SOLVED: To provide a means to acquire impulse response data for more natural listening without increasing the number of reference frequencies. PSOLUTION: The interpolated sound reflection-absorption coefficient calculation section 204 creates interpolated sound reflection-absorption coefficient data D208 for the interpolated frequency points by using the sound reflection-absorption coefficient data D904 for the reference frequency points. The point echo diagram calculation section 902 creates point echo diagram data D907 for the reference frequency points and the interpolated frequency points by using the sound reflection-absorption coefficient data D904 and the interpolated sound reflection-absorption coefficient data D208. The band echo diagram calculation section 903 creates band echo diagram data D908 from the point echo diagram data D907 by using the time waveform cross-fading on the frequency axis. The adder section 904 creates impulse response data D909 by adding band echo diagram data D908. PCOPYRIGHT: (C)2006,JPO&NCIPI