This is off-topic, but Paul Devereux is an expert on the archaeoacoustics – megalithic acoustics & their possible applications. He’s written a book on Stone Age Soundtracks, the acoustic archaeology of ancient sites.
The video is a little dry – but the information is deep and interesting – and seems to tie into some of the ideas that Steve Roach has explored in his ambient music.
You can read more about Devereaux and Sounds From The Stone Age at The Music Of Sound.
And let me know if you remember the screwball comedy about an expert in the acoustic properties of prehistoric rocks!