US 11,884,209 B2
Sound signal generation device, sound signal generation method, and sound signal generation program
Osamu Maeda, Iwata (JP)
Assigned to SOUND DESIGN LAB LLC, Iwata (JP)
Appl. No. 17/616,432
Filed by SOUND DESIGN LAB LLC, Iwata (JP)
PCT Filed May 11, 2020, PCT No. PCT/JP2020/018868
§ 371(c)(1), (2) Date Dec. 3, 2021,
PCT Pub. No. WO2021/229656, PCT Pub. Date Nov. 18, 2021.
Prior Publication US 2022/0234498 A1, Jul. 28, 2022
Int. Cl. B60Q 5/00 (2006.01); G10K 15/02 (2006.01)
CPC B60Q 5/008 (2013.01) [G10K 15/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A sound signal generation device comprising:
an operation amount data acquisition means, being a processing unit comprising a central processing unit (CPU) and a memory, that acquires operation amount data indicating an accelerator operation amount in an electric vehicle on which an electric motor for vehicle driving is mounted;
a running speed data acquisition means, being the processing unit comprising the central processing unit (CPU) and the memory, that acquires running speed data indicating running speed of the electric vehicle;
a virtual running speed calculation means, being the processing unit comprising the central processing unit (CPU) and the memory, that calculates a virtual running speed of a vehicle on which an engine of an internal combustion type is mounted;
a modification means, being the processing unit comprising the central processing unit (CPU) and the memory, that modifies the calculated virtual running speed on the basis of the acquired running speed data;
a virtual rotation speed calculation means, being the processing unit comprising the central processing unit (CPU) and the memory, that calculates a virtual rotation speed of the engine on the basis of the modified virtual running speed; and
a generation means, being the processing unit comprising the central processing unit (CPU) and the memory, that generates an artificial engine sound signal indicating an artificial sound of the engine corresponding to a running state of the electric vehicle on the basis of the accelerator operation amount indicated by the acquired operation amount data and the calculated virtual rotation speed,
wherein the virtual running speed calculation means calculates the virtual running speed by excluding an influence of a gradient of a road on which the electric vehicle moves and an influence of braking resistance of the electric vehicle.