Patent ID: 6859539

Claim:
A sound synthesizer for a vehicle that includes a driving operation detector that detects an operation amount of a driving operation input device by a driver, a speed calculator that calculates a revolution speed of a drive unit based on the detected operation amount, a sound controller that outputs a sound control signal based on an input of the operation amount and based on the revolution speed, a memory that stores drive sound data in advance, and a synthesized sound output generator that reads out drive sound data from the memory and that outputs a voltage signal corresponding to a sound pressure signal, wherein: the memory divides the operational state of the drive unit into plural stages by using the operation amount and the revolution speed as parameters; the memory stores each driving sound which is recorded in the operational period as digital data of the driving sound at a wavelength of a sound pressure waveform which is substantially the same as a cyclic sound interval of the drive unit; and the sound controller outputs sound control signals so that drive sound data within a range of an operational state corresponding to the inputted operation amount and the revolution speed is repetitively played.