This high-pitched ringing could be the sound that made US diplomats in Cuba mysteriously fall ill.
The alleged attacks, believed to have been carried out at Havana’s American Embassy, led to workers complaining of a range of symptoms including dizziness and trouble sleeping.
US officials say it was down to a sonic weapon that produced a sound like the one you can hear below.
The recording is not dangerous to listen to. Experts say they know of no sound that can cause physical… Read the full story