| 摘要 |
There is provided a masking sound output device which prevents interference and an echo even in the case where plural apparatus output the same masking sounds. A masking sound generating unit 11 reproduces each of a disturbing sound, a background sound, and a dramatic sound repeatedly for a prescribed time each time. Return reproduction of each of the disturbing sound and the background sound is started with prescribed timing before it is reproduced fully for the prescribed time. The start timing of the return reproduction varies from one device to another. Unlike the disturbing sound and the background sound, the dramatic sound is not returned halfway; its reproduction timing is adjusted by inserting silent intervals. In particular, the silent interval length of the dramatic sound is varied randomly so that a listener does not recognize the repetition. |
