A "boom" is a loud, deep sound that often resembles an explosion or a thunderclap. It can occur in various contexts, such as during fireworks displays, thunderstorms, or when a large object falls. The sound is produced by rapid pressure changes in the air, creating a wave that travels outward. In addition to natural occurrences, booms are also used in music and film to create dramatic effects. For example, in movies, a boom sound can enhance suspense or excitement. The term can also refer to the booming sound of certain musical instruments, like drums, which produce deep, resonant tones.