The power revolves around the ability to communicate through sound effects whether they can actually use spoken words as well or not. Examples include Beardo from Total Drama and especially the title character from Gerald McBoing-Boing.
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Koichi Hirose's Echoes ACT 1 from Jojo Bizarre Adventure has as similar ability but in a manner of offense, but if you're not talking about offensive sounds then the power you're talking about will be call Sound Generation, if not then it definately Voice Manipulation.
(Edited by King Eliot)