Hive mind: Quick, I need an example from science fiction in which a human's mind is influenced by a sound ray or a brain wave.

(Sometimes I write fun stuff where a reference like this is relevant.)

@estherschindler Hmmmm. How does the seraphim talk to her in Madeline L'Engle's the wind in the door? Is that one of those?

@estherschindler To Meg, was it Progo? Mr. Jenkins? The Echthroi... I forget