Perhaps this type of research can help uncover the wide range of frequency and phase effects both temporary and “permanent” experienced and described by insight practitioners and many others. Perhaps one could study this as one shifted through vipassana jhanas and formless realms. The Holy Grail would be pre and post paths and deep abiding non-dual realizations, as these appear to have not just a rope-snake level interpretive component, but also an essential “everything in tune with itself” component. Easy to hypothesize that awakening levels attenuate and eventually radically transform something measurable about the two phases you describe.