[LAD] twice as loud

[Ralf Mardorf]

On Sun, 2010-07-25 at 03:31 -0400, Tim E. Real wrote:
> Hey, you know that little triangular flap of skin that almost 
>  covers the ear, just above the earlobe?
> 
> Whaddya think if humans are (were?) to evolve that
>  little flap so it can be completely and tightly pressed
>  against the ear (like you can do now with your finger)
>  thus acting as an 'eyelid' for your ear in case things get 
>  too loud ? 
> 
> I mean what the heck is it doing there now, eh?
> 
> Tim.

I'm asking for forgiveness because it's the second PS :S.

How does the external ear exactly work? Perhaps it's part of this
function, to reflect sound.