I'm just about to turn 52, and I've got the ears of a 60+er. I can hear the 8K, but only if I turn my speakers way up. Must be the years on the farm I spent sitting on the tractor with the smokestack blasting out six feet from my left ear. My ears would ring until the next morning, when I'd go out there and do it all over again.
I can just about make 14 K still I think. I used to test myself regularly in my younger days and could usually get to 18K or above. Advancing age and decrepitude is creeping in (or should that be galloping? ;-)
After reading LegacyOfHerot's post#1 and his comment on the true meaning of "poor cultural fit" at
I guess the next euphemism for "You're too old" will be "We require all new-hires to be able to hear 12 KHz"...
Even with rock and roll -- which is less demanding than classical in terms of audio system performance -- there is a benefit to wide bandwidth.
There is a reason that listeners naturally gravitate to the "smiley face" equalizer settings for rock (boost the lows and highs, leave the mid-range at 0 dB). You want more bass, but you also want more cymbals.
The magic words here are "harmonics" and "phasing." There is even some evidence that some (probably younger) people can perceive a difference between systems that only reproduce 20 kHz of bandwidth vs. systems that are ever more wideband.
Psychoacoustics is a very complex subject, and some of the variables of the processor (human brain) that interprets those eardrum vibrations are not so easily quantified.
I will ping a few friends at Dolby and DTS and see if I can get someone to chime in on this thread...
Good Point -- it would be interesting to listen to the same piece of music as you suggest -- it would also be interesting to compare the effect with different types of music -- like classical vs rock and roll...
I also got onto such a site recently. tried some of the tones and couldn't hear a thing. Then my workmate across the room - who is 24 - piped up - "Dave - what the hell are you doing?"
It's terrible getting old.....
Don't fret Max. Even though you can't consciously detect tones above 12 kHz on a test like this, I suspect that you still appreciate (and can perceive to some degree) frequencies above 12 kHz.
If you had the opportunity to listen to a piece of music that was sharply lowpass filtered at 12 kHz vs. the same piece with 20 kHz of bandwidth -- on a good stereo system & good headphones of course -- I think you would be able to hear the difference, and would say that the system with wider bandwidth sounds better.
Us old guys can still appreciate high fidelity :)
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.