So Sonic Attacks in a hotel is possible.
Though it could be the Cuban Gov't, I think that Russian Gov't might do this to sabotage things between US and CUBA.
If this were the Russians....you’d see this multiplied out and in Europe as well. All you’d need is a non-description van. I think it’s just one guy or a small group. There is some agenda behind it...no doubt.
It would be curious to ask the KGB if they had a test lab associated with the Cubans and if this had been a project left over from the 1980s/1990s.