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In Reply to: RE: Just Google Dynamic Range Human Hearing posted by fmak on October 16, 2016 at 01:20:52
Earlier you said:"human hearing has a dynamic range of up to 130 dB.
Football players and diff maker have no basis in determining the Physics of Acoustics."
I am not saying that my examples "determine the Physics of Acoustics." I am saying that they demonstrate practical, real, every day limitations of the human ear.
In the presence of a continuous 130dB signal, it is demonstrably impossible for even young, healthy, twenty somethings to distinguish shouted human voices from more than 3 meters away. In the absence of that background noise, those same ears could likely hear the same shouted voice more than 50 meters away.
Likewise, in the presence of a continuous musical signal, it will be difficult for individuals with normal hearing to perceive even a brass band playing a Sousa march, so long as it is far enough down in the mix. If you don't believe me, try the audio diffmaker listener challenge. In my opinion, this tends to undercut claims that random noises even farther down in the mix than the brass band will be audible to individuals with normal hearing.
Could there be exceptions to my claims? Quite possibly. Every bell-curve has freaks out at the extreme edges. However, for the vast majority of listeners, they are going to be constrained by normal human limitations and for them I think I am right. To bolster this claim, may I observe that I've yet to find a single inmate who is able to show that they can beat the Audio diffmaker challenge.
Even if one inmate does demonstrate this ability, it does not mean that any other inmates, or other non-inmates can. Again, my claims are not about theoretical limits which only apply to theoretical inmates, but are about practical claims which apply to average inmates.
Are you an inmate interested in saving money? Take the Audio Diffmaker listeners' challenge linked below. You don't need to report back to this board or to anyone else. However, if you find it difficult to tell which track has the brass band mixed in, you may want to wonder why you should fling kilo bux at components simply based on the claims of people you've never met, and who have never actually demonstrated that they have better hearing than yours. And no, anecdotal claims about hearing imaginary differences are not a demonstration of anything other than self-delusion.
It may be a wrench to realize that you only have normally hearing instead of putative bat like hearing, but it will save you a small fortune other wise wasted on needless component upgrades that will be better spent on actual music.
Follow this link to get the Audio Diffmaker software:
http://www.libinst.com/Audio%20DiffMaker.htm
Below, scroll down to find the challenge files.
JE
"A difference which makes no difference is no difference at all." - William James
Edits: 10/16/16Follow Ups:
In the presence of a continuous 130dB signal, it is demonstrably impossible for even young, healthy, twenty somethings to distinguish shouted human voices from more than 3 meters away. In the absence of that background noise, those same ears could likely hear the same shouted voice more than 50 meters away.
One factor in this is that you're pushing the ears to the pain threshold. In my case, my ears "clip" before even getting to the point of pain. Clipping is the best word I can think of to describe it, sound becomes extremely distorted like I've hit a hard limit. In very loud stadium crowd environments, and at some loud concerts, I have to wear earplugs to hear anything because otherwise my ears are being driven to the limit.
I'm guessing that even with hearing protection, NFL players are routinely exposed to ear damaging sound levels.
I'll also assert that you need not set your playback levels to 130dB to experience audio masking. Simply take the Audio Diffmaker listening challenge I linked to before in this thread and see if you can discern the brass band hidden behind the boys' choir. So far I'm unaware of any inmate in this asylum who has even tried the challenge, much less beat it.
JE
"A difference which makes no difference is no difference at all." - William James
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