Yeah this has actually happened to me a couple of times at a location near Blackpool I visited last summer. We were doing a spirit box session in one of the back rooms and every single time someone asked a direct question there was this burst of static that wasnt there during the quiet bits. Could be totally mundane, like the device picking up on sound frequencies or something, but the timing was so specific it was hard to ignore.
Im pretty skeptical about most EVP stuff if im honest, I think a lot of people hear what they want to hear in white noise. But the static thing is different because its not about interpretation, its just there on the recording plain as anything.
Anyone managed to rule out equipment issues as a cause? Like have you tried different recorders and got the same result? That would make it a lot more interesting to me. I'd rather find a boring explanation than get excited over something thats just a dodgy mic.