Patent ID: 6356185
Filing Date: 2002-03-12
Classification: A63H,G10H,G10K

Abstract:
A sound processor for producing replicated engine sounds in response to the operating dynamics of a vehicle engine, the sound processor comprising:a sound memory containing at least one sound signature representing at least one engine cycle of an engine sound to be replicated; an RPM sensor for sensing a rotational speed of the vehicle engine; an RPM derivative sensor for sensing a first derivative of the rotational speed of the vehicle engine; and an audio processor for producing an audio signal representing a replicated engine sound by continuously repeating a portion of the sound signature from the sound memory corresponding to an integer number of engine cycles, the audio processor modulating the replicated sound signature based on the rotational speed of the vehicle engine sensed by the RPM sensor by adjusting a duration and repetition rate of the portion of the sound signature corresponding to an integer number of engine cycles, wherein the audio processor modulates the audio signal based on the first derivative of the rotational speed of the vehicle engine sensed by the RPM derivative sensor.