I’ve never heard anything about worrying about a voice. I find when I read I have an internal narration that puts my conscious thought on the subject. Sometimes I’ll read a line, realize the inflection should be something different and kind of reinternalize it like that. Every once in a while something I read will kick off an other thought that distracts me but I’ll come back and realize I’d kept reading for a bit while thinking of something entirely else and have to go back.