| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a masker sound generation device capable of reducing feeling of discomfort of a listener even when a masking target is a human voice sound. <P>SOLUTION: A masker sound is generated by combining a disturbance sound, a background sound and an effect sound. A disturbance sound is a sound which disturbs a sound to be masked, and is made by modifying a human voice sound on a time axis or on a frequency axis in such a way that it should not make any lexical sense (its content should be incomprehensible). A background sound is an agreeable sound to which a listener is not likely to pay attention, such as a sound of a stream, and a rustle of trees. An effect sound is a sound with high presentation effect such as a musical sound which appears intermittently. Each of the background sound and the effect sound has its peak frequency on a higher range side than a peak frequency of the disturbance sound, and has such characteristics as not to obstruct the disturbance sound. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
