Fire alarm beeping in triplets
A distant, long military alarm signal or siren.
Various course tone modulating in pitch and speed - with variations
A factory or industrial warning alert or alarm.
A low range buzzer or alarm repeated frequently.
Bondinho Pão de Açucar - Beep 2X Aviso Bonde de Carga Chegando Estação Morro Menor
Whoop Type Alert, spaceship or security breach type alert
Friendly alert slightly comical or friendly robot
Emergency alarm, surreal or out of control, destruction or meltdown
Aggressive robotic or alien vocal can be used for malfunction or mechanical failure