Audible
Part of speech: adjective
Definition: Able to be heard.
Part of speech: verb
Definition: To change the play at the line of scrimmage by yelling out a new one.
Part of speech: noun
Definition: The act of or an instance of changing the play at the line of scrimmage by yelling out a new one.
Sonic
Part of speech: adjective
Definition: of or relating to soundhaving a speed approaching that of the speed of sound in air
Example sentence: Robin Williams understands sonic performances. He understands what it's like to change your voice up.