RE: Arrow Speed, Misjudged Yardage & Ethics
On that note, the speed of sound travels much faster than todays bows. Until bows take the lead, an alert deer will always have the edge.
If you are shooting a loud bow, do what you can to make it as quiet as possible. Then, if you want to minimize the potential of a deer "jumping the string", only take shots at relaxed deer.
If a deer is alert and looking around for what is making it nervous, it's muscles are tensed and it's prepared to easily bound away. If it's relaxed, jumping the string is rarely a problem.