I have not heard my Woodsman Elites whistle, but a friend standing beside me could hear a little whistle when I shot. I couldn't believe it, so he shot an arrow of mine tipped with a Woodsman Elite, I stood to the side, and by golly, I did hear a slight wistle.
I have shot quite a few animals with Woodsmans, coyotes, whitetails, mule deer, elk, and antelope. I don't know if they heard a whistle or not, they just bled to death.
I just might try the slight grinding method in Mr. Kelly's post, or go up to the 160 gr. non-vented.