Americans warned not to visit Cuba
Oct 13th, 2017, 05:26 AM
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This is the latest report from AP news service (via cibercuba and using Google Translate)
https://www.cibercuba.com/noticias/2...edium=facebook
The Associated Press received a recording of the sound of alleged acoustic attacks received by some officials of the US embassy in Havana, which has resulted in a new crisis in bilateral relations between the two countries.
The audio, released Thursday, is the first test released among the various sonic samples taken by US specialists in Cuba. The recordings have already been sent to both the intelligence services and the US Navy, which has the technological capability to analyze acoustic signals.
However, AP claims that the recordings do not represent a significant step forward in elucidating the origin of these mysterious events, and for now, according to the agency, neither the Navy nor the State Department has responded to requests for comments about this possible evidence.
Cuba has denied participation or prior knowledge of the attacks, but Washington has criticized the island government for failing to guarantee the physical integrity of its diplomatic personnel on the island.
In turn, AP claims that it has reviewed different audios, taken under different circumstances, and all show variations of the same acute sound. The people who heard these noises in Havana confirm that the recordings are generally coincident.
"That's the sound," one of them said, though AP did not reveal his name. The recording released by the agency has been digitally optimized to increase the volume and reduce background noise.
The sound seemed to manifest in pulses of different lengths (seven seconds, 12 seconds, two seconds) with sustained periods of several minutes or more. Then there would be a lapse of a second of silence, or 13 seconds, or four seconds, before the sound started again abruptly.
It is not clear if there is a direct relationship between the sound and the physical damage suffered by the victims. The United States says that, in general, the attacks caused hearing, cognitive, visual, balance, sleep, and other problems.
A more detailed examination of a recording through a spectrum analyzer, which measures the frequency and amplitude of a signal, further reveals about 20 or more different frequencies or tones. For the human ear, multiple frequencies may sound a bit like the dissonant keys of a piano struck at a time.
"What you're saying is that the sound is between about 7,000 kHz and 8,000 kHz. There are about 20 peaks, and they appear to be equally spaced." All of these peaks correspond to a different frequency, "said Kausik Sarkar, an acoustics expert and an engineering professor at George Washington University who reviewed the recording with the AP.
Researchers have explored whether infrasound or ultrasound could be at play in the Havana attacks. Recordings have been reproduced for employees of the US embassy in Cuba, seeking to identify what they heard, although recordings seem to rule out the possibility of a high-tech weapon with electromagnetic pulses.
At least 22 individuals are "medically confirmed" as affected, and the number could increase, according to the State Department. The attacks began last year and continued frequently, following an incident reported late last August.
Cuban officials did not say whether the United States has shared recordings with the island's government, but Havana has reiterated its readiness to assist in investigating the events.
At the moment, Washington refuses to share information with Cuban investigators, and Raúl Castro's government has also requested, without success, access to victims and US medical personnel.
https://www.cibercuba.com/noticias/2...edium=facebook
The Associated Press received a recording of the sound of alleged acoustic attacks received by some officials of the US embassy in Havana, which has resulted in a new crisis in bilateral relations between the two countries.
The audio, released Thursday, is the first test released among the various sonic samples taken by US specialists in Cuba. The recordings have already been sent to both the intelligence services and the US Navy, which has the technological capability to analyze acoustic signals.
However, AP claims that the recordings do not represent a significant step forward in elucidating the origin of these mysterious events, and for now, according to the agency, neither the Navy nor the State Department has responded to requests for comments about this possible evidence.
Cuba has denied participation or prior knowledge of the attacks, but Washington has criticized the island government for failing to guarantee the physical integrity of its diplomatic personnel on the island.
In turn, AP claims that it has reviewed different audios, taken under different circumstances, and all show variations of the same acute sound. The people who heard these noises in Havana confirm that the recordings are generally coincident.
"That's the sound," one of them said, though AP did not reveal his name. The recording released by the agency has been digitally optimized to increase the volume and reduce background noise.
The sound seemed to manifest in pulses of different lengths (seven seconds, 12 seconds, two seconds) with sustained periods of several minutes or more. Then there would be a lapse of a second of silence, or 13 seconds, or four seconds, before the sound started again abruptly.
It is not clear if there is a direct relationship between the sound and the physical damage suffered by the victims. The United States says that, in general, the attacks caused hearing, cognitive, visual, balance, sleep, and other problems.
A more detailed examination of a recording through a spectrum analyzer, which measures the frequency and amplitude of a signal, further reveals about 20 or more different frequencies or tones. For the human ear, multiple frequencies may sound a bit like the dissonant keys of a piano struck at a time.
"What you're saying is that the sound is between about 7,000 kHz and 8,000 kHz. There are about 20 peaks, and they appear to be equally spaced." All of these peaks correspond to a different frequency, "said Kausik Sarkar, an acoustics expert and an engineering professor at George Washington University who reviewed the recording with the AP.
Researchers have explored whether infrasound or ultrasound could be at play in the Havana attacks. Recordings have been reproduced for employees of the US embassy in Cuba, seeking to identify what they heard, although recordings seem to rule out the possibility of a high-tech weapon with electromagnetic pulses.
At least 22 individuals are "medically confirmed" as affected, and the number could increase, according to the State Department. The attacks began last year and continued frequently, following an incident reported late last August.
Cuban officials did not say whether the United States has shared recordings with the island's government, but Havana has reiterated its readiness to assist in investigating the events.
At the moment, Washington refuses to share information with Cuban investigators, and Raúl Castro's government has also requested, without success, access to victims and US medical personnel.
