Ambulance sirens are loud warning devices used by emergency vehicles, such as ambulances, to alert drivers and pedestrians of their presence. The high-pitched sound helps clear the way during emergencies, allowing medical personnel to reach patients quickly. Sirens typically produce a variety of tones and patterns to ensure they are heard over traffic noise. The design of ambulance sirens is based on the principles of sound frequency and volume. Different siren patterns, like the wail or yelp, are used depending on the situation. These variations help convey urgency and can be more effective in different environments, such as urban or rural areas.