US spies in Havana hit by bizarre health attacks

southeast US
Originally Posted By: SubieRubyRoo
Ultrasound or infrasonics may be at play here.
yeah, my bet is on infrasounds. maybe russkies tried to scare americans and the harm was a side effect?
One study has suggested that infrasound may cause feelings of awe or fear in humans. It has also been suggested that since it is not consciously perceived, it may make people feel vaguely that odd or supernatural events are taking place.[34] Engineer Vic Tandy provided such an explanation in his investigations in the 1980s. Tandy, while working in his laboratory, started to feel uneasy and as if a supernatural presence was with him. Later, he could attribute these feelings to a broken metal fan was causing noises of a frequency that triggered them. The noise could not be perceived by the human ear, but Tandy's body reacted to the 19Hz sounds.[35]
The presence of the tone resulted in a significant number (22%) of respondents reporting feeling uneasy or sorrowful, getting chills down the spine or nervous feelings of revulsion or fear. In presenting the evidence to the British Association for the Advancement of Science, Professor Richard Wiseman said "These results suggest that low frequency sound can cause people to have unusual experiences even though they cannot consciously detect infrasound. Some scientists have suggested that this level of sound may be present at some allegedly haunted sites and so cause people to have odd sensations that they attribute to a ghost—our findings support these ideas."[34][44][45]