I expected to hear back from them but I never heard a 'whisper'. [=I never heard from them again]
“I've had more than I can stand,” she complained in a 'stage whisper'.
I couldn't hear what they were saying because they were 'whispering'.
(..) He's got the dirtiest mouth. I love it. Like what? The dirty talk, what does he say? - Children in the vicinity. - So whisper. Just tell me one. They sound so stupid out of context. OK, like, "Baby, I wanna come on your tits." See, it sounds so stupid. Oh, my God! There's a snake. Come on. (..)2003 TvShow: Six Feet Under Title: Making Love Work Season: 3 Episode 6