Then why do they use simulated female voices in cockpit warnings? This is settled science - not.
Or female voices on a Tom Tom.
IIRC, the decision to use female voice when the “plane” speaks was made at a time when only men flew in combat. The female voice made it easy for the pilot to know “pull up” was coming from his plane to him, not one of his squadron mates talking to perhaps anyone else on the frequency. I believe the pilots originally referred to the voice as “Bitchin’ Betty”. My wife and I still refer to our GPS as “Betty” for that reason.
And I use a female voice setting on my GPS. Female voices are easier to pick out and understand under conditions of high ambient noise -- PROVIDED the female voice is understood as having something important to communicate.
It's been years since I read the study - dealt with when a woman's voice should be used in an emergency and when a man's voice should be used. I'd probably get it backwards after all these years - but both types of voices in certain circumstances - are needed...
“Then why do they use simulated female voices in cockpit warnings?”
Probably because those voices sound like mommy, talk sufficiently like a man, or something.
Because men respond well to a woman shouting “Pull up, pull up, pull up!”