She sighed and lowered her head, speaking into the microphone hidden under her collar.

The affair came to light with the discovery late last month of a microphone hidden under the prosecutor's floorboards.

I believe he has one or more microphones hidden some place and that he hears all our plans.

They learned that their domestic staff were spying on them, and discovered microphones hidden throughout the house.

He wondered whether after all there was a microphone hidden somewhere near.

The Marine peered closely at the light fixture and then noticed the tiny, omni-directional microphone hidden within it.

I had a microphone hidden in my clothes.

This character has microphones hidden in the intercom boxes inside the apartments.

Some 18 to 20 small microphones, mostly hidden, will circle the orchestra pit; a similar number will be oriented to the stage.

Dan called to the microphone hidden in the wall.