11/30/2023 0 Comments Telescopes auditory illusions![]() ![]() It was like a vision that they received from the other world. ![]() "I think that was what motivated them to build the actual structure that matched this virtual impression. It would have been this completely baffling experience, and anything that was mysterious like that in the past was considered to be magic and supernatural. "If these people in the past were dancing in a circle around two pipers and were experiencing the loud and soft and loud and soft regions that happen when an interference pattern is set up, they would have felt there were these massive objects arranged in a ring. Some drew circles of pillars, and one volunteer added lintels, a striking feature of the Stonehenge monument. He then asked participants to sketch out the shape of any obstructions they thought lay between them and the flutes. To follow up, Waller recruited volunteers, blindfolded them, and led them in a circle around the instruments. It gave me a feeling of peace and quiet," he said. It felt like I was being sheltered from the sound. "What I found unexpected was how I experienced those regions of quiet. When he walked around them in a circle, the volume rose, fell and rose again as the sound waves interfered with each other. ![]() To investigate whether instruments could create such auditory illusions, Waller rigged two flutes to an air pump so they played the same note continuously. Quiet patches created by acoustic interference could have led to the "auditory illusion" that invisible objects stood between a listener and the instruments being played, he added. In Neolithic times, the nature of sound waves – and their ability to reinforce and cancel each other out – would have been mysterious enough to verge on the magical, Waller said. Waller, an independent researcher in California, said the layout of the stones corresponded to the regular spacing of loud and quiet sounds created by acoustic interference when two instruments played the same note continuously. ![]()
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