Vehicle sound synthesizer
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorOsamu Maeda
Life of this patent
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Abstract
A sound synthesizer for a vehicle includes a driving operation detector that detects an operation amount of a driving operation input device by a driver. A speed calculator calculates a revolution speed of a drive unit based on the detected operation amount. A sound controller outputs a sound control signal based on an input of the operation amount and based on the revolution speed. A memory stores drive sound data in advance. A synthesized sound output generator reads out drive sound data from the memory and outputs a voltage signal corresponding to a sound pressure signal. The sound controller outputs sound control signals so that the drive sound data within a range of the operational state corresponding to the inputted operation amount and the revolution speed is repetitively played.
Claims2
A sound control signal to control a sound synthesizer to cause the sound synthesizer to generate sound that simulates the sound of an internal combustion engine having a plurality of cylinders, the cylinders having a firing interval, the sound control signal comprising:
- a repetition rate that matches the firing interval;
- a first sound signal applied to the sound synthesizer, the first sound signal having at least one of:
- a first pitch that can be varied for each firing interval, and
- a first volume that can be varied for each firing interval;
- and
- a second sound signal applied to the sound synthesizer concurrently with the first sound signal, the second sound signal having at least one of:
- a second pitch that can be varied for each firing interval independently of the first pitch of the first sound signal, and
- a second volume that can be varied for each firing interval independently of the first volume of the first sound signal.
Dependencies are inferred from the claim text.