A perfect radio will draw no attention to itself, will make it seem we are in the very presence of the source of its sound. Neither do we watch a movie screen, nor look at television. We look at what is on television, or in the movie, and become annoyed when the equipment intrudes—when the film is unfocused or the picture tube malfunctions. When machinery functions perfectly it ceases to be there—but so do we. Radios and films allow us to be where we are not and not be where we are.
