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And, that's with a not very deep shooter's dip? about 2 db and not wide.
it's not a wall \-----
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Frankly that reads as a: 'mine is 12 inches long" claim :-)
If assumed correct then Your hearing is absolutely outstanding.. Unique even.
In actual Audio testings by an Audiologist... Very few Human males can hear 14 KHZ by their 60th B'day.
Truthfully ?.. few 40 yr olds can do this.
Hearing loss is Very real fact of aging. All jokes aside.
Edits: 02/28/19
This is rare in boy sopranos, I was one for the best part of 9 years.But it is, for me, distressingly common among female sopranos. And, they tend to be it, in church choirs, leaving aside cathedrals.
My comment was meant to signal that even age-ING guys can still hear and pick good sound over crap!
I did manage to protect my hearing on the firing range, soft crap in ears, and cup style industrial ear muffs, plus a powered mega-phone!
But I hunted as well, and that's where over-kill ear protection, beyond foam cylinders, is a bad idea, so I do have a mild shooter's dip.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Edits: 03/03/19
...and supporting text doesn't doesn't do much to clarify what was really meant. i.e. Response to 5KHz is enough to detect a shrill soprano IME.
for what it is worth... hearing loss NEVER occurs @ 20Hz {not talking about organic hearing loss hear, only age related and loud noise exposure} so I assumed the writer MEANT 20K... in which anyone over 30 can no longer hear 20K anyway and being able to hear 25K @ 18 years old is long past for myself.
I can still recall hearing the 19K flyback transformer sound of tube TV's being turned on whilst walking in my neighborhood circa 1976 @ 14 years old.
The Mind has No Firewall~ U.S. Army War College.
Not that it matters much, but I think the flyback frequency (tied to the horizontal scan rate) was closer to 16kHz.
15.625 kHz for PAL, 15.734 kHz
_
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I think he confused the 15KHz TV horizontal scan freq with the 19KHz freq of FM stereo pilot signal. This signal should be mostly attenuated in any decent MPX decoder and would be well down in a mono tuner due to 75uS demphasis. Personally I've heard the 15KHz racket when CRT TVs were the norm but never heard the 19KHz pilot directly.
~!
The Mind has No Firewall~ U.S. Army War College.
If you assume that the ears are the only means of sensing high frequency information then I concur. Dick Sequerra once told me that the ocular cavities are major receptors to ultrasonic information and I dug up this short paper that supports that notion.
Dave
In a world where remote high frequency hearing acuity evaluations are frequently and freely offered by anonymous authorities (not to mention remote intelligence and mental health evaluations by the same), this article is most welcome as it addresses some important and seldom looked at phenomena which would seem to be very important to real audiophiles.
Paul
We fans of big ugly horns have known that all along.
;^)
Seriously, VERY interesting article, thank you for the link.
Duke
Me being a dealer makes you leery?? It gets worse... I'm a manufacturer too.
I'll have to read that - so far, I just read the abstract. In any case, it's quite clear that there are many avenues for sound to be "heard". Our skull is one of them, along with the mouth and sinus cavities. And we've all heard the phrase "chest-pounding bass". That's because our lungs, esophagus and stomach all resonant to sound, and our nerves send that data to the brain.
Fascinating stuff! For folks who are really into this sort of thing and other psychoacoustic stuff, I recommend either joining the Acoustical Society of America (ASA) or reading their journal at a library.
It IS valid what he says, the latest HAARP design is built on the Antarctic sea floor, as you know... sound travels 4 and 1/2 times faster through water than ambient air. Since those advertising experiments in New York city {2007?}whereby on a particular street corner one oould HEAR the voice in their head. So far as for the love of music; am not sure how much emotional enjoyment is added by this 'source' when properly transmitted.
The Mind has No Firewall~ U.S. Army War College.
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