Which tones can you hear?

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I do not remember having sensitive hearing at any time in my life. Some sounds annoyed me more but I never could hear stuff at higher frequencies than most peoeple.

I'm 23

In school I don't remember failing any hearing tests.

I tested my hearing around two years ago with a function generator and a cheap speaker. It went up to around 15.5k before I couldn't hear it.

On the first link I could barely hear the 15kHz after turning the volume on my stereo and computer as loud as possible. On my headphones at maximum volume I couldn't hear anything at all.

On the second link I could hear the 10k and 12k at slightly above average listening level on my stereo. If I turn everything to maximum I can hear all except the highest. At normal listening level on the headphones I could barely hear the 18.8k. I think my stereo shifts the high frequency down and then has a cutoff so high frequencies won't damage the speakers.

Conclusion: Too many unknown variables. No way to measure dB level of signal. No way to test the actual freq output in case it is shift/cutoff at some step. No way to test dB of noise.

Up to 12k can be heard at normal or slightly above normal listening levels. Continuous dropoff up to around 15k. With no noise and higher volume I can hear a little higher, probably around 17k. The decibel level was high enough to make my ears hurt.