| 摘要 |
PROBLEM TO BE SOLVED: To generate many impulse responses that respectively have a tone similar to that of a preliminarily-given impulse response and have a low correlation with one another.SOLUTION: An impulse response generation device relating to the invention comprises: a signal separation section 10 that separates an impulse response into an early-reflected sound and a back echo; a time window multiplication section 20 that multiplies the early-reflected sound and the back echo by a window function obtained by applying multiple time-shifts to a time window having a prescribed time length; a random number generation section 30 that uses a random number to generate a time-shift quantity; a time shifting section 40 that, with respect to each time window, temporally shifts an output about the early-reflected sound in the time window multiplication section within a time range of the early-reflected sound and temporally shifts an output about the back echo in the time window multiplication section within a time range of the back echo, on the basis of the time-shift quantity; and a signal summation section 50 that sums the outputs about the early-reflected sound and back echo in the time shifting section. |
