If your arrows, or broadheads or bow are making noise, the deer will hear it.
Granted this was VERY close, but I had a doe hear my wood arrow sliding along my velcro arrow rug Sunday ( I was starting the draw), and she stopped, ears perked.
Some arrows are louder than we give credit, and the only way to know is to SAFELY have someone listen as they are zinging by, maybe past a corner of the house or some similar scenario.
Someone recently posted a short video of them shooting in their back yard, with a Go Pro or similar by the target face. OMG I could hear the bow go off and the arrows approach the target. If I can, a deer can. And I heard it with enough time to have moved a bit, much less a hair trigger deer.
CHuckC