Reversing is aided by the deployment of an audio visual alarm that includes both auditory and visual cues. The audio-visual alarm is very important in open cast mines while reversing equipment, especially dumpers and tippers, to warn pedestrians.

With the aid of audible and visible signal, audio visual alarms are employed for safety and security purposes.

Electronic hooter/siren: For alerting the public these are accumulated of electronic circuits (oscillators, modulators, and amplifiers). These are linked to the external speakers which ultimately produce a selected tone of sound for different emergencies.

ALL INDUSTRICAL SIREN