Anons are not supposed to nominate their own digs for notable.
LURK MOAR
Agree. Some sort of ultrasonic device.
Abstract of article that JAMA cited in Neurological Manifestations Among US Government Personnel Reporting Directional Audible and Sensory Phenomena in Havana, Cuba article
https://jamanetwork.com/journals/jama/article-abstract/2673168
https://spqr.eecs.umich.edu/papers/YanFuXu-Cuba-CSE-TR-001-18.pdf
I had same path to conclusion.
I guess Florinef just doesn't cut it.