Sound synthesis device using modulated noise signal

A device for sound synthesis intended to generate a desired acoustic signal comprising:

• a first signal source which, during operation, emits a periodic signal having a given repetition frequency as a representation of the voiced parts of the desired acoustic signal,
• a second signal source which, during operation, emits an aperiodic signal or a noise signal as a representation of the unvoiced parts of the desired acoustic signal,
• a combination circuit for combining the signals of the two signal sources with each other,
• a filter circuit having a variable transmission function for processing the combined signal into the desired output signal, and
• a third signal source which, during operation, emits a modulated noise signal comprising a train or sequence of noise pips of comparatively short duration, whose temporal envelope is synchronous with the temporal envelope of said periodic signal and which noise pips invariably have at least approximately the same energy, and wherein the modulated noise signal is supplied, during operation, together with the signal of the first signal source to the combination circuit.