Volume calibrtation with bass emphasizing headphones

[Voytek]

Shannon wrote:

Volume calibrtation with bass emphasizing headphones would change to put the subliminalized audio further down into barely audible range for masked, and I would say no change is required for ultrasonics.

I`m using those kind of headphones. What does subliminalized audio mean? All audio (voices with masking audio) or only voices with programming?