I can't quite put my finger on it ... but all of this seems rather familiar, doesn't it (?)
Further extract:
https://www.scientificexploration.org/docs/32/jse_32_3_Nahm.pdf
Investigating “Physical Mediums” via Audio Signal
Processing: A Comment on a Recent Approach
MICHAEL NAHM
Institute for Frontier Areas of Psychology and Mental Health (IGPP), Freiburg, Germany
Submitted: June 5, 2018; Accepted August 3, 2018; Published September 30, 2018
Abstract—Technological advances in recent decades offer possibilities to
study the phenomena of physical mediumship using new approaches of
investigation. One new approach is the analyses of supposed “spirit voic-
es” recorded in dark séance rooms during sittings with the alleged physi-
cal medium Warren Caylor. These analyses were performed by a professor
of applied informatics, Eckhard Kruse. He concluded that the results of his
investigations provide evidence, if not proof, demonstrating that these
voices are indeed produced by materialized “spirits,” and he publicized this
interpretation of his work via various dissemination channels. As I will show
in this article, however, Kruse’s approach to studying these “spirit voices”
is loaded with conceptual and methodological deficiencies that ultimately
render his claims untenable.
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Further extract:
" A prominent recent example of how a fraudulent medium was unmasked
concerns Gary Mannion. He was long surrounded by suspicions—especially
after a former circle leader and very close friend of his, Michael Mayo,
noted several times in dim light that Mannion impersonated the “spirits”
himself. At a later séance in November 2014, Mayo secretly examined the
chair to which Mannion was bound when sitters at the other end of the
room claimed they were touched by a “spirit” in the dark—and indeed the
chair on which the entranced Mannion was supposed to rest motionless
was empty (Anonymous 2016a, Anonymous 2016b).
As a result of even more suspicions (Whitham 2016), Mannion was
secretly filmed with an infrared camera during a séance on May 1, 2016.
This very instructive and recommendable documentation of what
really happens during séances with Mannion is available on the Internet
(Anonymous no date).
In general, it appears to be easy to dupe guest sitters who fasten the ties
around the arms of mediums. Often, they never secured mediums before,
and they are not trained to examine the critical details in September this year. "
https://www.scientificexploration.org/docs/32/jse_32_3_Nahm.pdf