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In Reply to: RE: real life has headroom...and lots of it. posted by middleground on October 21, 2014 at 06:13:24
One thing that may not be clear. The inability to hear sine waves at high frequencies does not imply the inability to benefit from extended high frequency response. Fifty years ago I could hear a 21 kHz sine wave, today it would be about 13 kHz in my best ear. However, I can still detect differences in sound quality when frequencies above 15 Khz are missing. I notice a loss of "air" with these recordings. Another way is on the dark side. Some recordings have noise at 15750 Hz caused by video interference. I can no longer hear this noise directly, but its presence imparts a grainy quality to these recordings. In some cases, filtering out is spike improves the sound quality.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Follow Ups:
my point exactly.
thanks,
mikel
Tony, I have problems with this ability to detect frequencies that normal ears can't hear.
I just have the regular older guy ears so when some music on my system gets on my nerves because of some annoying lack of air or grit or whatever, I just call it a day and accept that I am a biological entity with vagaries that can't be (re)calibrated.
I have completely normal ears. Like yours, they aren't as good as they used to be. I commented on what I know to be true from editing recordings and filtering out "inaudible" high frequencies. Making these frequencies go away makes the music sound less lifelike. There are many mastering engineers in the same boat. Like other people they can perceive the "theoretically" impossible. But the theory is false. It assumes that acoustics and processing in the ear/brain/mind are linear and they are not. Linearity is a mathematical simplification. It does not apply to the real world. This is the same BS theory that says because nobody can hear 22 kHz sine waves that 44 kHz digital audio is sufficient.
I know I can't hear the TV set noise any longer (if I still had a CRT TV), but I can still hear changing the level of high frequencies above 15 Khz with an equalizer. Although lots of those high frequencies are supposedly inaudible to me compared to my youth, live concerts sound just as good as they used to.
But then, I never listened to rock music or went to rock concerts or worked with noisy power tools. Apart from specific health issues, most hearing loss is caused by excessive use, i.e. listening to many loud sounds.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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