Women also undergo voice change, just less pronounced. Now the problem turns into being able to tell men from women. EDIT: this of course isn't a serious prop

Women also undergo voice change, just less pronounced. Now the problem turns into being able to tell men from women. EDIT: this of course isn't a serious proposition. Then again I wonder what effect this would have implemented on e.g. a porn site. Women also watch porn, but with enough tuning I think it shouldn't produce too many false positives - if only due to the demographic of the users. Surely the vocal cords and larynx of an adult woman are on average larger than those of a 10yo boy?