Much of the discussion around unmanned aerial vehicles (drones) is directed toward its capabilities of surveillance and attack. However for those living in areas of conflict, it is the engine sound of the drones that has devastating psychological effects. Military drones fly at high altitudes and are more easily heard than seen. Even the origin of the word "drone" is rooted in sound, and comes from the sound of the male honeybee. The sound of drones in areas of conflict creates soundscapes of terror that can go on for many hours. The buzzing of the engines has generated nicknames like "zanana" in Palestine and "bangana" in Pakistan. A Study into 21st Century Drone Acoustics is an auditive investigation by composer Gonçalo F. Cardoso (Discrepant) and designer Ruben Pater (Drone Survival Guide). What kind engines are drones equipped with? What do they sound like? What are the psychological effects of the sounds in areas of conflict? Side A features field recordings of 17 drone types, ranging from small consumer drones to large military drones. The B-side presents a soundscape by Cardoso, inspired by the abusive and destructive power or drone technology. The composition focuses on the conceptual (sound) life and death of an aerial drone machine in the 21st century. The project is intended for use in installation in various museums and festivals. The sounds are available for free at droneacoustics.org. Concept by Gonçalo F. Cardoso and Ruben Pater. B-side composition written and composed by Gonçalo F. Cardoso. Voice by Emmet O'Donnell. Mastered and cut by Rashad Becker at D&M, Berlin. Metallic finish sleeve by Ruben Pater. Includes 12-page booklet.