Black's Law Dictionary:

CRIER

An officer of a court, who makes proclamations. His principal duties are to announce the opening of the court and its adjournment and the fact that certain special matters are about to be transacted, to announce the admission of persons to the bar, to call the names of jurors, witnesses, and parties, to announce that a witness has been sworn, to proclaim silence when so directed, and generally to make such proclamations of a public nature as the judges order.