Fair use only applies to copyrighted material. A voice, a mode of speech, is not copyrightable. Step one in a copyright defense it to prove that no "taking" o

Fair use only applies to copyrighted material. A voice, a mode of speech, is not copyrightable. Step one in a copyright defense it to prove that no "taking" occurred, or that any involved material wasn't protected by copyright (Lohan v. GTA). Only then do you get to affirmative defenses such as fair use (Hustler). This case would not get that far, not absent evidence of literal copies of her recorded voice being played back by the software.