Even very loud sounds move air by only about a micron.

Evidence

Even very loud sounds correspond to a movement of the air back and forth by only a small fraction of a millimeter. (For example, in box 2.3, we found that the air is moving to and fro by only about a micron or 10-6 m, in a very loud, 94 dB, 1000 Hz tone.) — Eric J. Heller, Why You Hear What You Hear- An…, 694

Categorization

• CANDY: The striking fact that a 94 dB tone moves air only one micron makes a good conversation piece.
• XREF: Directly recalls the reader’s parallel interest in silence work where air displacement and sound field amplitudes came up.