In the autumn of 2016 U.S. diplomats stationed in Cuba started to complain about being affected by some mysterious noise. Twenty four embassy staff and family claimed a bizarre list of symptoms - from headaches, dizziness and sleeping difficulties to problems with balance, vision and hearing. Doctors were not sure what affected these people. There were all kinds of speculations about a mysterious 'sonic weapons' with which the diplomats were 'attacked', but no convincing evidence was found.

Cuba fully cooperated with an FBI investigation into the mystery. Scientist dispelled the idea of a 'sonic weapon' attack. The medical evidence turned out to be dubious. Nevertheless anti-Cuban politicians in the U.S. successfully used the issue to pressure the White House to penalize the country. The Trump administration recalled 60% of its embassy personal in Havana and expelled Cuban diplomats from the embassy in Washington. It issued a travel warning for its citizens going to Cuba and stopped issuing visas for Cubans in Havana.

The investigation continued. Some recordings of the mysterious noise were made and doctors played various of these to the affected persons. The patients confirmed that the sound was like the noise that had bothered them. On October 17 2017 those sound files were given to the Associated Press and published (vid).