The Hum was the combined sound of the communications of members of the exogorth species. Though humans could not hear it, exogorths were able to deliver complex messages to one another through the Hum. When it was time for a Clew, an event in which the exogorths would congregate and mate, the Hum changed slightly.[1]
Appearances
- "This Is No Cave" — From a Certain Point of View: The Empire Strikes Back (and audiobook) (First appearance)