nuisance ring tone
I don't know .. it supposed to be funny story or what.
As we made the descend-turn to final on a VOR_DME letdown , a "WHOOP WHOOP PULL UP " sound twice heard then stop.After checking the approach profile we continued to land. On the ground I found out that it came from a cellphone of another pilot who accidentally left it. It use prerecorded GPWS test calls-out as the incoming-message warning tone ! Some so called smartphone can do that.
Not so smart after all .. i guess