MASKER SOUND GENERATION DEVICE, STORAGE MEDIUM WHICH STORES MASKER SOUND SIGNAL, MASKER SOUND PLAYER DEVICE, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To alleviate discomfort caused to people in a space where a masker sound is emitted while ensuring the masking effect within the space.SOLUTION: In a superposition process, a CPU 21 extracts sound signals of differing intervals within a human voice sound signal X-n, superposes the extracted sound signals upon a time axis, and outputs the sound signal X-n superposed upon the time axis. Additionally, in a shift adding process, the CPU 21 carries out a shift process on a sound signal X-n, which is a process of transposing sound signals prior to a reference location of the sound signal X-n and sound signals after the reference location thereof, and outputs a sound signal X-n obtained by adding a sound signal X'-n on which the shift process has been carried out to the original sound signal X-n on which the shift process has not been carried out.