» The Ghost in the Machine
Published in the Journal of the Society for Psychical Research
Vol.62, No 851 April 1998
Vic Tandy
In this paper we outline an as yet
undocumented natural cause for some
cases of ostensible haunting. Using the
first author’s own experience as an
example, we show how a 19hz standing
air wave may under certain conditions
create sensory phenomena suggestive of
a ghost.
