Like this example from Shalom Auslander writing in Tablet Magazine:
The Marijuana Voice: Doing this would be so much easier if you were stoned.
The New York Times Book Review Voice: I don’t know what this is, but I know what it isn’t; it isn’t the voice of the author’s generation, it isn’t an important new work, it isn’t a bold new voice, it isn’t the future of American fiction, and it doesn’t limn anything; I’ve read it twice now, and it doesn’t limn a fucking thing.
The Voice of American Express: This better sell well, you’re carrying a tremendous amount of debt.
My Publisher’s Voice: This was done once, and it didn’t sell very well.
Read more of his voices here.