Ghost in the shell
The Ghost in the Machine
Published in the Journal of the Society for Psychical Research Vol.62, No 851 April 1998
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. The mechanics and physiology
of this ‘ghost in the machine’ effect is outlined. Spontaneous case researchers are encouraged to rule out this potential natural explanation for paranormal experience in future cases of the haunting or poltergeistic type.