A car horn is a sound-producing device installed in vehicles, primarily used to alert other drivers, pedestrians, or cyclists of a car's presence. It typically emits a loud, honking noise when activated by pressing a button on the steering wheel. Car horns are essential for safety, helping to prevent accidents by warning others of potential dangers. Most car horns operate using an electrical system that powers a diaphragm or air compressor, creating sound. The sound can vary in tone and volume, but it is designed to be attention-grabbing. In many places, the use of car horns is regulated to prevent excessive noise pollution and ensure they are used appropriately.