So the fact that Mrs Thatcher took positive steps to lower the pitch of her voice was a perfectly rational response to a real problem. Under the guidance of the National Theatre, she underwent training that included humming exercises aimed at lowering her previously natural pitch. Comparing recordings of speeches she made before and after tuition reveals a clearly audible difference. When played through a pitch and intensity analyser, the reduction in pitch came out at 46 Hz – a figure that’s almost half the average difference in pitch between male and female voices.
This significant decrease was all the more remarkable because it was achieved after Mrs Thatcher had already passed the age at which the pitch of women's voices tends naturally to rise: generally speaking, it falls up to the age of about forty-five, after which the it gradually starts to rise.
Margaret Thatcher and the evolution of a charismatic woman. Part I: Cultural and vocal challenges
Very, very intersting!!
Interesting. I didn’t know this. Bookmarked for later.