Dear @dogberry : " is hopeful, at best ".
Well in the link posted ( the first one. ) those gentlemans came from CalTech, MIT and AES, so are not ametaurs but gentlemans with high knowledge levels and try to explain as better they can:
" From the fact that changes in subjects' EEGs "persist in the absence of high frequency stimulation," Oohashi and his colleagues infer that in audio comparisons, a substantial silent period is required between successive samples to avoid the second evaluation's being corrupted by "hangover" of reaction to the first. The preprint gives photos of EEG results for only three of sixteen subjects. I hope that more will be published ".
At the end is that exist lower than we can think knowledge levels by scientist of the overall human being TRUE " operation " whole body and specially this high frequency main subject because who cares about when it's enough that " somebody " says: " inaudible " and that's it. Rigth?
R.