One last thought, the speed of sound is about 1125 fps, so the sound reaches them long before an arrow does!
Where did you read that. just wondering because for one the speed of sound is not constant. it travels through diferent mediums at different rates of speed.
The one i stated was only an example. and lets be honest how many people are actually shooting over 340 fps with their setup. and i am talking about an actual speed not the IBO.