1. Auditory warning in any helicopter will always be transmitted via headsets (elctric or helmets), so ambient noise is irrelevant.
2. They are almost always followed by visual warnings.
3. Serial tasking is catered for by repetitive tasking, rehearsed learning and a memory of events via the semantic memory (as opposed to episodic/long term memory).
4. If you want to do this properly, invite yourself to a helicopter training school (preferably military)who may let you into their ways of preparing students for emergencies.
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TC