I believe that Paul Devereux was mentioned in support of an argument. I can't comment on the subject here, but beware of experts and resist accepting expertise through the back-door of someones opinion, especially when their argument requires it.
I don't want to get all horrible about this but I just read the review of Stoneage Soundtracks and my opinion the expertise is in seemingly getting this published without even a school-level understanding of physics. Avoiding logic to suit. It's bizzarre!
Don't believe me - this has a site review.
And I'd like to point out his conclusions might be correct,- I don't know, but they certainly don't follow from this flawed contrivance, unless the review is way shoddy?? check yourself.
remember your basics though
Opposite walls, bounce , bounce, whatever the distance apart there's always a wavelength that fits.
Science; intention, ? maybe but not required.
110hz is not the baritone or any other range. it is a frequency. A 55hz signal is a bit low, we hear better its harmonics (eg110)-as created when bouncing 55hz around.
human bodies all too readily carry 'mains hum'. its in the air and we act like antennaes. try using electrical equipment that doesn't account of this and it often dominates. Although the hum is 50hz in fundament you could hear it as 100hz- if you wanted to.- or 110 even in such a complex environment, the world is your baritone range as they say.
Standing waves aren't likely to stabalize between walls more hole than rock. I'd look for another source myself - see above.
Finally, if you require the effect described, which is caused by the reinforcement of audio waves bouncing back and forth, then remember that wavelength - frequency thing from school?
100hz has a wavelength of what? - work it out.
Such an effect is from node to anti-node,(quater-wavelength)
So to be of any point, the user would have to be small,,,very small.
Those rocks are big and heavy.
So, what have we got.?
mini-baritones with machines.
Is it possible that ancient civilisation of bull-frogs, with access to Plant Hire Outlets who could provide drivers also, are the real answer to Stonehenge.
Daft but at least the physics works. I'd hate it to be simply daft.