" Why are we so afraid of silence? Teenagers cannot study without their records; they walk along the street with their transistors. Grownups are as bad if not worse; we turn on the TV or the radio the minute we come into the house or start the car. The pollution of noise in our cities is as destructive as the pollution of air. We show our fear of silence in our conversation: I wonder if the orally-minded Elizabethan's used " um" and " er" the way we do? And increasingly prevalent is what my husband calls an articulated pause: " You know." We interject " you know" meaninglessly into every sentence, in order that the flow of our speech should not be interrupted by such a terrifying thing as silence. "