The day arrived, and shortly before the procedure was to begin, a rich baritone voice came over the audio system in the operating room.

"She's all yours, Captain," Reed's voice came over the system.

After several minutes, the man's voice stopped and loud applause came over the sound system.

Captain Picard's voice came over the system.

The voice that came over the intercommunicating system was loud enough for everyone to hear.

A few bars of brassy music came over the sound system as Beeker paused, weighing his words carefully.

The announcement of closing time came over the public-address system.

A voice came over the audio system.

A uniformed soldier served coffee, and classical music came over the sound system.

Teachers still punch time clocks and interrupt what they are doing when the voice of the principal comes over the public-address system.