Vacuum cleaner oreck turn on run up dirt floor mat turn off cord free electrikbroom
Turning on and turning off a chop saw
Turning on a chop saw, cut wood and turn off
Cessna 172 Skyhawk interior cockpit turn on electric hum turn off
Turning on a strobe light switch
Turning on a emergency system with a beep
Computer printer, HP Deskjet D1470, switched on.
Walkie talkie ringing, beeps