Yeah I was quite surprised! I've got a video going up on the headphone show this week which is on the subject of 'Do DACs make a difference' and ABXing between different oversampling filters. And after at least an hour discussing WHY there was an audible difference with Blaine (Mad Economist), he asked 'have you actually checked what you are able to hear upto?'. Which I had notWow, your hearing is above the 20 Hz-20 kHz limit of the average human. Congrats!
I’m not joking; this is remarkable.
And yeah, turns out my upper limit is around 21k so that's pretty neat