On Sep 11, 9:20 am, wrote:
On Sep 11, 5:49 am, (Scott Dorsey) wrote:
wrote:
I agree that hearing 20 -20K is a myth.
Why? I could hear 22KC as a child, and I can still hear 18KC today. Now,
I can hear a 1KC tone a lot more easily than I can hear an 18KC tone or
a 36C tone, but that doesn't make the usable range a "myth."
In looking at program on a
spectrum analyzer I've found that there's very little energy below 50
or above 12K,
What program material, created how? I can hand you off a percussion ensemble
with lots of energy below 50C and above 12KC. On the other hand, for spoken
word, you won't find anywhere near as wide a range. Depends on the source,
and humans are designed to deal with sounds from widely varying sources.
Be careful about spoken word spectrum. While we have the abominable
precedents being set by telcom the actual spectrum can be 100 Hz to 15
KHz. Some consonants have significant energy above 12 KHz. Take the
German zwei. A voice actress speaking had a spectrogram showing the
leading consonant with energy starting at 7 KHz going to 16 KHz,
peaking around 12 KHz. Downsampling experiments developed a noticable
lisp when bandlimited to 5 KHz.
bobs
Bob Smith
BS Studios
we organize chaoshttp://www.bsstudios.com
And then again Chartruessss... has plenty of energy above
20k...
))) we're talking film dialog here and why it is so often
unintelligible and not the sonic nuance of a Stradavarius Violin...
granted not overly apparent harmonics, supersonic freqs, etc do effect
overall sound quality... but I don't think that is why the dialog is
not understood above the ambience...
I guess my real point is that in this "Deaf Generation" a large
segment of the general population has a big hole in their ability to
hear at 2k or therebouts at normal listening levels.... Oops, i said
"normal listening levels"... who knows what that is...I do have to
remind myself that listening to dialog at high SPls in headphones is
not an accurate representation of what an audience might do or
want.... one of the things I really like about ppm metering is that I
can get a decent idea of S/N ratios visually... knowing that certain
frequency's at certain levels have a masking effect, might help some
editors figure out why know one can understand what the actors are
saying... And then again, mumblers like dusty make it a challenge
for anyone...
J... apologise if i sound ****y... I'm in a rotten mood. my bad!