Been getting this more frequently over the last few months and its genuinely unsettling in the best way. Did a session out at a site near the coast a few weeks back and asked something like "how long have you been here" and got back what sounded very clearly like "since the war." No prompting, no leading questions, just a direct response in context.
The thing that gets me is the latency - proper responses tend to come within about 2-3 seconds of the question ending. The ones that feel like noise or pareidolia are usually either too fast or way too delayed. Thats been my rough rule of thumb for filtering anyway.
What recorder setup are people using when they get these? I'm on a Tascam DR-05X at the moment with a decent external mic and the signal clarity has improved my capture rate noticeably compared to the built-in. Would be curious whether anyone's found a pattern with location type as well, because I'm getting better results outdoors near water than in buildings, which goes against what I expected.