Ok Guys something for you to sink your teeth into;

I’m an aerospace test engineer so for me this stuff comes naturally. As and off-season project I’m going to record in a sound studio the sound my bow makes at release without any string silencers. Then I plan to go through a test matrix putting different brand silencers at different locations on the Bus cables and String and attempt to tune the release noise. The question for all you experts out there is, what frequency range (not distance) can deer hear? And what’s your opinion about which bothers or makes them flinch/jump more, high frequency or low frequency?