Did anyone else feel something weird at the old Briar Hill sanitarium last weekend?

Went Saturday night with two others from the Cheshire group. Around 11pm near the old intake corridor we all got this horrible pressure feeling in our ears, like your ears pop on a plane but it just... sat there and didn't clear. One of the lads got a nosebleed which has never happened to him on a hunt before.

The temperature readings were all over the place too, not in the usual "cold spot" way, more like the whole ambient temp was fluctuating by 3-4 degrees every few minutes. My K2 was going absolutely mental in that back stairwell.

What time were you lot there? I'm wondering if whatever was active that night had a peak window because it all went dead quiet around 1am and we got nothing after that. Would be good to cross reference if others noticed the same cutoff point.

@NotARelic that pressure sensation is really well documented in certain building types - old sanitariums especially because of the way the corridor architecture creates standing wave acoustics. Infrasound is almost certainly what you're dealing with. Frequencies below 20hz can cause that exact ear pressure, unease, and even visual disturbances in some people. Old ventilation systems, crumbling duct work, even wind passing over broken window frames can generate it.

What's worth noting is whether the feeling was localised to that specific stretch of corridor or followed you as you moved. If its localised thats a strong indicator of a resonant node rather than a psychological effect spreading through the group. Did anyone have a K2 or any audio recording running? You can sometimes catch infrasound artefacts on a decent recorder even if the frequency is technically below range - shows up as waveform pressure on the visual display.

The ear pressure thing is interesting because it can point to infrasound - frequencies below 20hz that old buildings sometimes generate through structural resonance, decaying pipes, that sort of thing. Briar Hill's intake corridor specifically has a documented history of this, I came across a local investigation report from around 2019 that logged similar readings in that exact stretch. Worth noting what time it was too, 11pm is when ambient noise drops enough for infrasound to become more perceptible to people without any equipment. Did the feeling track with any particular spot or was it constant throughout the corridor?