> While I have not served in Cuba, my experience in a number of similar hostile, high counterintelligence threat countries suggests that this is more likely a surveillance effort gone wrong, than the use of an offensive sonic weapon.

Considering it happened in a hotel room in a targeted fashion I believe this is the most obvious answer.

The story about the extreme lengths Russian's put into tapping the Moscow embassy is a classic:

> Even the sidewalks and streets throughout the neighborhood were embedded with electronic collection gear which was designed to turn the embassy building into a giant antenna.