Motor vehicle provided with a sound generation aerodynamic apparatus

A motor vehicle comprising a sound emitting instrument configured to emit sound, the sound emitting instrument comprising:

• an aerophone instrument arranged so as to be invested by an air flow corresponding to a forward motion of the motor vehicle, wherein the aerophone instrument is configured to emit at least part of said sound passively through the air flow;
• an active device configured to actively control a property of said sound;
• and
• a control apparatus comprising a mapping to associate a speed of the motor vehicle with a desired value of a variable corresponding to said property, the control apparatus being configured to:
• determine the speed of the motor vehicle,
• determine the desired value of the variable using the mapping and the determined speed, and
• control the active device as a function of the desired value according to a control algorithm to adjust a deviation between an actual value of the variable and the desired value of the variable.

A sound emitting instrument for use with a motor vehicle, the sound emitting instrument being configured to emit sound and comprises:

• an aerophone instrument arranged so as to be invested by an aerodynamic flow corresponding to a forward motion of the motor vehicle, wherein the aerophone instrument is configured to emit at least part of said sound through the aerodynamic flow;
• an active device configured to actively control a property of said sound;
• and
• a control system in communication with the active device, wherein the control system is adapted to:
• determine the speed of the motor vehicle,
• associate the determined speed of the motor vehicle with a desired value of a variable corresponding to said property of said sound, and
• control the active device as a function of the desired value according to a control law to reduce a deviation between an actual value of the variable and the desired value of the variable.