What is this thing women and girls are doing with their voices? It makes them sound sort of strangled.?

I don t think it s natural. It s seems to be a fad like uptalking where they add a questioning intonation at the end of sentences. This effect is not intermittent. They conduct entire conversations with that strangled sound. Even professional actresses and commentators are doing it on TV. Not all of them of course, just the young ones. What are they doing and how are they doing it. If you were trying to imitate it what would you do?