[ Murderbot has given Chizuru a drone. It furiously checks the footage for whispers in the last week. It isolates some tied to individuals, but it can always make out what those are saying. Still, it pulls those sound clips and bundles them together. ]

It sounds like a magical effect.
To be sure, these are the whispers I pulled from your drone in the last week.

[ It sends over whispers.mp3 ]

If you mean something else, then... they are not freely available in your environment.