Age related hearing loss starts after the age of 12 and affects everyone to different degrees. While I respect your intention for this thread, I don't think it'll serve the purpose you intend.
There'll be people in their 30's, 40's or 50's claiming their card has "no coilwhine". If you dig deeper, they'll be playing at 1080P or 1440P (where card doesn't load loaded up enough for it to manifest) or they simply not able to hear it.
Others will say no coil whine, yet have their case fans, AIO pumps on max for a very noisy PC to begin with, masking the coilwhine.
Many will say things like "I'm in my 40's and can hear a pin drop, I have no coilwhine" but if you actually test them with a hearing test >
they'll not be able to hear past 14k hz etc.
On the above video, I can hear the tone very loud @ 15,100HZ, then it completely drops off for me, just as an example of someone in their thirties. I have a work mate also in his thirties who went to many heavy metal concerts, who can't hear past 12k. He'll notice no coil whine if his card is at these frequencies etc.