What is "tuned in"

Usage examples of "tuned in".

Eve lifted a brow and tuned in to Mavis's voice rising over clashing brass.

He tuned in for all three, trying to erode his grief in nightly frenzies of lustful fulfillment.

And frankly, my dear, you are the stronger telepath and, I think, more tuned in to Peter's mind than Sascha is.

The midshipmen weren't alone in the debriefing rooms off hangar deck when a signal rating, prompted by Whitbread, tuned in the stateroom.

A few heads turnedand, she knew, more than a few cops' ears tuned in.

Spreading my fingertips against the glass, I tuned in and scanned.