What the Hell Is a 'Covert Sonic Device' and Why Is It Deafening Diplomats in Cuba?

This all sounds sinister... if your ears are actually working.

from gizmodo http://www.gizmodo.co.uk/2017/08/what-the-hell-is-a-covert-sonic-device-and-why-is-it-deafening-diplomats-in-cuba/