A vehicle sound 
synthesis system may be configured to generate a vehicle sound 
signal tuned to an ambient condition in an area external to a vehicle. The 
system may detect the ambient condition, such as a 
weather condition, a 
time condition, a traffic condition, a location condition, or an ambient sound condition. The 
system may synthesize the vehicle sound 
signal, and set an acoustical parameter of the vehicle sound 
signal based on the ambient condition. The acoustical parameter may include a frequency, an amplitude, a phase, modulation, or a time 
delay. The vehicle sound signal may be indicative of operation of the vehicle. The 
system may drive a 
sound generation device to produce sound 
waves corresponding to the synthesized vehicle sound signal and audible in a variety of ambient conditions to alert pedestrians and / or occupants of other vehicles to the presence of the vehicle generating the sound.