I agree with just starting the count, making sure it is seen [at shoulder level and up] so the throw-in team has no premise for acting stoopid.
I have seen and heard some college officials give an easily heard "One!" and sometimes a "One! Two!". I don't know if that is an approved or suggested mechanic or not, but I do not care for it. ...Why would you have to coddle college athletes ? Why pamper High school athletes ?