EV vehicle driving sound control system and control method

An electric vehicle driving sound control system, comprising:

• a sound output device of generating a reinforcing sound in order to reinforce a driving sound of an electric vehicle (EV);
• a power change amount measurement sensor of measuring a power change signal of the EV in real time;
• an indoor noise measurement sensor mounted in an indoor of the EV and detecting an indoor noise of the EV;
• and
• a signal processing controller configured for controlling the sound output device by applying a variable frequency band filter upon acceleration of the EV, and performing a high-frequency noise masking control upon deceleration of the EV, by use of traveling information related to the EV inputted from CAN communication in a real time and signals inputted from an indoor noise measurement sensor and the power change amount measurement sensor,
• wherein the signal processing controller is configured to match and output an acceleration sound corresponding to a general internal combustion engine upon the acceleration of the EV,
• wherein the acceleration feeling sound component is extracted from an engine order arrangement arranged based on revolutions per minute (RPM) of the motor,
• wherein the acceleration feeling sound component applies a variable bandwidth filter which is proportional to the RPM of the motor,
• wherein the acceleration feeling sound component to which the variable bandwidth filter is applied has an indoor tone subject to a proportional-integral-differential (PID) control by the indoor noise measurement sensor.

An electric vehicle driving sound control method, comprising:

• applying, by a signal processing controller, a variable frequency band filter upon acceleration of an electric vehicle (EV);
• and
• performing, by the signal processing controller, a high-frequency noise masking control upon deceleration of the EV by operating one or more among a torque and revolutions per minute (RPM) of a motor of the EV, a pedal opening amount, a vehicle speed, a traveling mode, and a gear position in the signal processing controller,
• wherein the signal processing controller is configured to match and output an acceleration sound corresponding to a general internal combustion engine upon the acceleration of the EV vehicle,
• wherein an acceleration feeling sound component is extracted from an engine order arrangement arranged based on the revolutions per minute (RPM) of the motor,
• wherein the acceleration feeling sound component applies a variable bandwidth filter which is proportional to the RPM of the motor,
• wherein the acceleration feeling sound component to which the variable bandwidth filter is applied has an indoor tone subject to a proportional-integral-differential (PID) control by an indoor noise measurement sensor or by an outdoor noise measurement sensor.