16: The Ghost Experiment - theories, infrasound

Monday, May 9, 2005 | Source: http://www.psy.herts.ac.uk/ghost/theories-infra.html

The explanation was that infrasound was coming from a large extractor ... Subsequent measurements revealed that the infrasound being produced was 18.98 Hz, and ...

View the full article at http://www.psy.herts.ac.uk/ghost/theories-infra.html.

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