From Rick Altman, "Television/Sound" in Studies in Entertainment: Critical Approaches to Mass Culture, ed. Tania Modleski, Bloomington: Indiana U. Press, 1986. 43

The deeper, paradoxical truth of our television is discursification of the world. It is not that seeing is believing (an earlier assumption of TV audiences) but that images collected just for us give us a sensation that no flat, historical account could possibly give. And only the prior announcement on the sound track can make those images seem to be made just for us. 51