Right so this is actually interesting timing because I noticed something similar last month. Been doing EVP sessions in my cellar for about two years now and the recordings after the full moon on the 12th had a noticeably different quality to them - harder to describe really, more layered? Like there were responses coming through that felt closer somehow.
Normally I get the usual class C faint stuff but that night I picked up what sounded like two distinct voices overlapping. Got my Zoom H5 running with a backup on my phone and both devices caught it so its definitely not equipment artefact.
Whether thats lunar influence or just coincidence I genuinely dont know. I try to stay skeptical about the mechanism even when the results are compelling. Would be curious if anyone here tracks their sessions against lunar cycles properly and has actual data rather than just impressions. Feel like thered be something worth looking at if enough of us compared notes.