I don't know when the ambient noises in my ear took over. But I guess it was around 13 kHz and I did not use headphones but tiny speakers. The speakers are also the reason I could not really hear tones below 50 Hz.

I have to do it once more with headphones.


Desktop; i7-2600k, 8 GB mem., Win 10 Pro, BIAB 2017; RB 2017 - latest build
Laptop: i5-2410M, 4 GB mem, Win 10 Pro, BIAB 2017; RB 2017 - latest build