An audio-visual alarm combines sound and light signals to alert people in various environments, such as industrial settings, security systems, and emergency situations. These alarms are useful in noisy areas where a visual cue is needed or in low-visibility conditions where an audible alert is necessary.

Here are some common types:

• Industrial alarms: Used in factories and hazardous areas to signal emergencies.
• Security alarms: Integrated into security systems to deter intruders.
• Fire alarms: Provide both flashing lights and loud sirens for evacuation.
• Vehicle alarms: Found in trucks and heavy machinery for safety alerts.