Many researchers aren’t considering infrasound in their current paranormal research. They should. When I update my free book, Is Your House Haunted?, I’m going to include a chapter about infrasound. In my own studies — which I will publish, as time permits — I’ve seen a high correlation between infrasound and certain types of paranormal reports.
As a starting point, check this PDF. (And thank heavens for the Wayback Machines, so we have access to these kinds of “vanished” reports.)