RE: Deer can hear arrow first? Not!
Rack the doppler effect is when sound waves crowed other sound waves.You here the train in the distance as it gets closer and it croweds out any low frequecies in the area.What did u hear first the train in the distance because it came first in order for the doppler effect to work on the bow sound both sounds the bow an arrow would have to be made together.The arrow would have to travel faster than the speed of sound to over take it.The medium desides the speed not volume.If the deer is within bow range he hears the bow first .I do agree that the arrow sound will scare him more and he is probable jumping the arrow sound not the bow sound but he hears the bow first.It also stands to reason that we should shoot the most quietes arrows that would be plastic vane with a mecanical broadhead.