a very flawed test?My #39 in the thread. I think that study was so interesting that I will take it again. The higher the frequency, the more sensitive we are to distortion. Those who participated in the study in the link below, at 10 kHz distortion was detected at 40-45 dB (1-0.5%) .
At lower frequencies, well a completely different ball game so to speak. "..mid-bass at 280 Hz and lower, the noise can be around -14 dB (20% distortion), about half as loud as the music itself, before we hear it....At 40 Hz, listeners accepted 100% distortion before they complained. The noise test tones had to reach 8,000 Hz and above before 1% distortion became audible, such is the masking effect of music.."
Its not about distortion but about masking.
And the masking is calculated w.r.t. the average level.
No wonder that the higher frequencies score better as there is less energy that can mask..