I know him as well, and wish him well on his investigation.
But I cannot see any role for infrasound at all in these experiences. It is interesting that a recent critique of infrasound has gone ignored in their case for doing the study hhhmmmm.....
A reasonable case, even a tentative one, needs to be made for infrasound. Tandy never made a convincing case for it :-\
If you compare it to the mag field debate there are some parallels. However, the mag field effect has been replicated across different laboratories and under single-blinded (and some double-blinded) conditions. So although a mechanism is vague - there are sound demonstrations of a non-specific effect.
I guess the infrasound people might try to say that different people have differing susceptibilities to the sound - but again my hunch is this will be unclear.
I no longer think that magnetic fields, on there own can induce strange experience (as some have claimed). I think they interact with other psychological / contextual / situational factors. So the effects are subtle and non-specific - but can, in some circumstances produce striking experiences. However, my research is suggesting that this is rare.