The sound in Havana: What Americans heard in Cuba attacks – Chicago Tribune

It sounds sort of like a mass of crickets. But not quite. A high-pitched whine, but from what? It seems to undulate, even writhe. Listen closely: Some hear multiple, distinct tones colliding in a nails-on-the-chalkboard effect.

The Associated Press has obtained a recording of what some U.S. Embassy workers heard in Havana, part of the series of unnerving incidents later deemed to be deliberate attacks. The recording, released Thursday by the AP, is the first disseminated publicly of the many taken in Cuba of sounds that led investigators initially to suspect a sonic weapon.

The recordings from Havana have been sent for analysis to the U.S. Navy, which has advanced capabilities for analyzing acoustic signals, and to the intelligence services, the AP has learned. But the recordings have not significantly advanced U.S. knowledge about what is harming diplomats. Officials say the government still doesn’t know what is responsible for injuries to its personnel, but the U.S. has faulted Cuba for failing to protect American diplomats on its soil.

The Navy and the State Department did not respond to requests for comment on the recording. Cuba has denied involvement or knowledge of the attacks.

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