"Electronic security has the eyes and ears to detect problems everywhere at all times."

His ears had detected a sound from the closed door farther back.

His ears had detected a slight sound from somewhere below.

Pressed to it, my ear detected no sounds from within.

The head turned upward as the ears, still hearing, detected a sound at the window.

He stopped with suddenness as his ears detected a new sound.

Buccari started to speak, but then her ears also detected the sound.

And there was no other dry ground his ears could detect.

His ears had detected a faint sound that seemed familiar.

Yet his ears detected the approach of footsteps from the hall.