This is an interesting site... ((( Smiles )))
Way out there but so into research..
On frequencies ..

While it is a true general statement that the frequency of the human voice is about 300 to 3000 Hz,
this statement is generalized,
over-simplified, and not entirely accurate.
In fact, the human voice ranges from 20 Hz to about 14,000 Hz.

Here are some more specific facts regarding frequency range of the human voice:

http://www.paranormalghost.com/evp_frequency_ranges.htm

They are really into frequencies on this site...
The even got down the hearing of a bat...

Bat Hearing Frequency Range - about 2,000-120,000 Hz
Squeal of Bats - about 20,000 Hz

And a screaming baby.. If human ears are not meant
to hear or deal with this kind of noise ??

Then why are babies and children given naturally...
In nature the capability to be so loud..

If it was not totally and humanly a naturally thing for ears
to hear ??

What goes wrong when our ears give out...
While other's who have had 6 or 10 children and..
come from huge familys of loud screaming children and babies
and..

Don't get hyperacusis disorder ever or maybe never comeing down with tinnitus...

What about that ?????

How many fequencies are contained within that noise
that the human ear has to deal with....
And cope with...

Naturally in nature ????

Screaming Baby - 115 dB