| 摘要 |
<P>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. <P>SOLUTION: In a superposition process, a CPU 21 extracts sound signals of differing intervals within a human voice sound signal X<SB POS="POST">12</SB>-n, superposes the extracted sound signals upon a time axis, and outputs the sound signal X<SB POS="POST">13</SB>-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<SB POS="POST">16</SB>-n, which is a process of transposing sound signals prior to a reference location of the sound signal X<SB POS="POST">16</SB>-n and sound signals after the reference location thereof, and outputs a sound signal X<SB POS="POST">17</SB>-n obtained by adding a sound signal X<SB POS="POST">16</SB>'-n on which the shift process has been carried out to the original sound signal X<SB POS="POST">16</SB>-n on which the shift process has not been carried out. <P>COPYRIGHT: (C)2013,JPO&INPIT |
