PURPOSE: To generate various kinds of simulated flying sounds by composing white nozzle signals and the output signals of an oscillator.

CONSTITUTION: The white signals generated from a white noise generator 6 are low and high pass filters 7-1 to 7-n. These filters 7-1 to 7-n are supplied with the band control signals Ba of a computer 5 so that the white noise signals are restricted in band and fed to subsequent level limiters 2al to 2an. These limiters 2al to 2an are supplied with the level control signals Ca of the computer 5, and the level control is carried out for each output of the filters 7-1 to 7-n to compose the respective outputs at a composing section 9 so that simulated flying signals are generated from a speaker 4