Audio Guerrilla - Underground grates.

Audio boxes are installed under the underground grates situated in the busiest parts of towns. Throughout the day, passers-by walking past hear the sound of harsh screams of a tortured man. The acute cries blare from under the grills and alert the pedestrians to look down and read – “Today 133 jounalists are imprisoned and tortured all over the world.”

Agency: DDB Brussels, Belgium.