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Originally posted by 1984hasarrived
Excellent thread - and it reminded me of a place I visited years ago n Irealnd which predates StoneHenge and the pyramids. Not sure if it has an acoustic links to it, but it might be of interest to you anyway.
It is called NewGrange and is a fascinating mound similar to one in your posts.
Originally posted by kiwifoot
An appreciation of acoustic effects can be traced all the way back to our Palaeolithic ancestors. According to Igor Reznikoff of Nanterre University, Paris, they may have used sound to navigate around cave networks. Different echoes and resonances would warn of deep holes in the cave floor, for instance, so by making noises people could find their way in the dark, perhaps to gather together far from marauding tribes or predatory animals. Similar effects might even have scared off would-be attackers: make a low hum in the right recess and the growl of a bison might resound down a whole gallery.