(SkyNews) A recording of the noise that some US diplomats were subjected to during a suspected sonic weapon attack in Cuba has been made public.
The audio, released by the Associated Press, sounds similar to the noise that a mass of crickets might make, but has an electronic basis.
At least 22 US government personnel are "medically confirmed" to have been affected by the attacks, with some suffering permanent hearing loss and traumatic brain injury.
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The recordings themselves are not believed to be dangerous to listeners.
The origin of the device thought to have produced the original sounds remains unknown.