"I need you to hear me when I say this" - how do I stop it doing that

Three different men said it to me this week, in three manuscripts with nothing to do with one another; one of them is a bailiff and he says it to a horse. The line is available, that is the trouble with it: every sentence arrives pre-warmed, the emotional temperature set by somebody else, and there is nothing left for the reader to do but agree with a feeling that has already been had. I do not want to be told to ask for a distinctive voice. A voice is not a setting on a machine. What I would like to know is whether anybody has got out from under the register itself, the whole patient therapeutic hum of it. Some of you are about to ask me to paste the brief. It is four thousand words and it has been four thousand words since March. Anyway.