An air horn is a device that produces a loud sound by releasing compressed air. It typically consists of a canister filled with air and a nozzle that directs the airflow. When the nozzle is pressed, the air escapes rapidly, creating a sharp, attention-grabbing noise. Air horns are commonly used in sports events, celebrations, and as signaling devices. These horns are often found in boating, emergency situations, and concerts to alert or entertain. They come in various sizes, from small handheld versions to larger models used in marine applications. Air horns are popular for their simplicity and effectiveness in producing sound.