‰  NOW 15 WPM  ‰  TEXT IS FROM OCTOBER 2018 QST  PAGE 67  ‰

HAUNTED LAB AT THE UNIVERSITY WHEN HE BEGAN TO FEEL UNEASY AND SAW A GREY
SHAPE OUT OF THE CORNER OF HIS EYE.  THE FOLLOWING DAY, HE HAD A SIMILAR
EXPERIENCE, BUT ALSO NOTICED THAT THE FENCING FOIL HE HAD BEEN WORKING ON
WAS SOMEHOW VIBRATING.  AFTER INVESTIGATING, TANDY DISCOVERED A SILENT FAN
IN THE LAB CREATING LOW FREQUENCY SOUND WAVES MEASURED AT 18R98 HZ.  AFTER
TURNING THE FAN OFF, THE UNSETTLING FEELING DISAPPEARED.  SOME STUDIES HAVE
SHOWN THAT INFRASOUND CAN CAUSE HEADACHES, NAUSEA, SLEEP DISORDERS, AND
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