Place it just before the departure moment in a travel edit, opening with a bell ding as a terminal chime, then this clip, then a dun dun dun sting if the traveller misses the flight and the scene needs a clear ending.
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This clip is a loud final boarding announcement lasting about 12 seconds, delivered as a clear spoken call in a public-address style. It feels urgent and slightly stressful, like time has almost run out, which also makes it funny when it lands on someone who is always late.