[Tade0]

> I suspect if I was a kid that used a deep voice to say that I was an adult it would also fool it.

There should exist frequencies impossible to reach for anyone but post-pubescent men.

Of course that would make it teen-age verification at best.

[wentw0rth]

> There should exist frequencies impossible to reach for anyone but post-pubescent men.... Of course that would make it teen-age verification at best.

Yes and no. Like geology, the more you dig into audio, the more is uncovered and available.

A child/teen with a deep voice has very unique perturbations that don't exist in other cohorts across feature sets. Adults may share some characteristics, but not at the levels found in specific age groups.

[Tiberium]

What about women, though? Do they not get to age verify themselves? :P

[Tade0]

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?

[wentw0rth]

The AGEWARDEN system is ^^ agnostic and answers a simple question only: Is this human over or under 18?

From my research, each person is incredibly unique :)