Patent ID: 11912194
Assignee: HYUNDAI MOTOR COMPANY
Field: Other consumer goods (Other fields)
Classification: CPC B  G  H | IPC B  G  H

Claim 7:
8. A method of outputting a sound of an electric vehicle, the method comprising:
storing, by a storage, opposed-phase sound sources of a noise according to a number of revolutions of a driving motor of the electric vehicle;
sensing, by a sensor, a driving speed of the electric vehicle and the number of revolutions of the driving motor when the driving speed of the electric vehicle exceeds a predetermined speed; and
outputting, by a controller, an opposed-phase sound source corresponding to the sensed number of revolutions of the driving motor among the stored opposed-phase sound sources to reduce the noise according the number of revolutions of the driving motor of the electric vehicle;
wherein the noise includes a noise of the driving motor, a noise of a decelerator, and a noise of an inverter that are generated as the driving motor rotates;
wherein the controller is configured to obtain separately the noise of the driving motor, the noise of a decelerator, and the noise of the inverter according to the number of revolutions of the driving motor of the electric vehicle;
obtaining each frequency information of the noise of the driving motor, the noise of the decelerator, and the noise of the inverter by performing Fast Fourier Transform (FFT) on the noise of the driving motor, the noise of the decelerator, and the noise of the inverter obtained separately according to the number of revolutions of the driving motor of the electric vehicle.