Patent ID: 7764800
Filing Date: 2010-07-27
Classification: B60L,G10K,H04R

Abstract:
1. A sound synthesizer for generating a sound that simulates the sound of an internal combustion engine having a plurality of cylinders, the sound synthesizer comprising: a memory arranged to store engine sound data corresponding to a plurality of operational states of the engine based on a firing interval of the cylinders; and an output generator arranged to output a voltage signal corresponding to a synthesized signal of first and second sound signals to a single speaker based on the engine sound data stored in the memory; wherein the output generator controls the first and second sound signals such that the first sound signal has at least one of a first pitch that is variable for each firing interval and a first volume that is variable for each firing interval, and the second sound signal has at least one of a second pitch that is variable for each firing interval independently of the first pitch of the first sound signal and a second volume that is variable for each firing interval independently of the first volume of the first sound signal.