public address system

“Stay in formation,” a sergeant from the ceremonial unit said over a public address system to the cops along the street.

Wright then “read the letter to the whole school over the public-address system.”

Clements did her best to keep the kids calm as gunfire and screams keep coming over the public address system.

In just a few minutes the public address system will announce contact and change of ship.

The plaza facing the Hall of Congress was filling up with citizens who had come to hear the speech over the public-address system.

People were being ushered to nearby classrooms where they would hear the proceedings over the school's public-address system.

He had almost forgotten the matter ten minutes later when the ship's public address system blurted loudly.

The signal had been transferred by inductance in the wall wiring and amplified over the public-address system.