Which one contributes more to alarm fatigue, spoken announcements like "bank angle" or beeps and buzzes like the autopilot disengage theme tune? Why is the latter so prominent?
If it's something that happens often (like on every trip or most days), a spoken announcement is more tiresome. If it happens rarely, the beep-encoded one is way more tiresome and can reduce situation awareness.
Curious if there's research - I'm sure there's tons, I just don't know that literature - but personally, in my experience as a professional aviator and as a spacecraft operator, the fatiguing alarms are the ones that are triggered in normal situations. If you start blinking red and squawking at me when I'm doing something nominal, you are training me to ignore you.
Autopilot disengage is heard every single flight and is completely benign... unless neither pilot was expecting it in which case it is very effective at getting our attention.
