| 摘要 |
<p>PURPOSE:To constitute the device so that a fluctuation noise of an arbitrary characteristic continued semipermanently can be obtained, and also, a frequency fluctuation sound having the same feature can be generated. CONSTITUTION:In the fluctuation sound generating device for generating a fluctuation by modulating a steady signal with an amplitude envelope signal, this device is provided with fluctuation signal generating means 1-3 for fetching the amplitude envelope signal from a composite tone of plural noise pulse trains whose repeat periods are different from each other, signal generating means 4-6 for generating a steady sound signal, and a modulating means 7 for modulating the steady signal with the amplitude envelope signal. In such a way, a fluctuation noise being semipermanent, and also, unsteady can be obtained. The fluctuation signal generating means 1-3 are provided with a noise pulse train control means 1 for controlling a generation timing of each component noise pulse train and its reproducing level, and this means has a fluctuation characteristic by irregularity of a generation interval of the noise pulse train, and also, the same sound type is not repeated but continued.</p> |
