John UM
According to Observer Network, in August 2017, the US State Department said that since the fall of 2016, “. a group of US diplomats and their families stationed in Cuba have experienced hearing loss ”. . and suspected that they have suffered from Cuba. Attack by the Advanced Sonic Device. The Cuban side resolutely denied this news, and the United States expelled two Cuban diplomats on this ground and subsequently expelled more Cuban diplomats. The incident also cast a shadow over the diplomatic relations between the two countries that had just resumed two years
Recently, two scientists published research results on related noise audio files. Research shows that these “noises” are not so mysterious – it is actually singing
According to the New York Times reported on January 4, the two scientists named Alexander Stubbs and Fernando Montealegre-Z, from the University of California, USA Berkeley and the University of Lincoln, UK. Stubbs published the results of the analysis at the annual meeting of the Society for Integrated and Comparative Biology (SICB), after which the two preliminary results were published on the paper platform bioRxiv. In addition, they plan to formally submit their papers to academic journals in the short term
Stubbs said in an interview: “. There is still much debate in the medical community about whether and how these people are physically damaged. But what I can be sure of is the recording published by the Associated Press. It’s a slap, and we think we know what kind of 蟋蟀”
(The picture is the noise spectrum released by the Associated Press).
Stubbs said that when he first heard the recording, he remembered some kind of insect he had encountered while doing field work in the Caribbean. He then worked with Monte Alegre to compare the sound of the sound and the sounds of many North American insects kept in the University of Florida database, and found the sound spectrum of the recording and the sound of an insect called the West Indian Macaque. Amazingly similar
(short-tailed West Indian cricket, insect picture database from the University of Florida).
“ As shown in this article, the sound of the West Indian macaque (Anurogryllus celerinictus) is subtle in terms of length, pulse repetition frequency, power spectrum, pulse stability, and oscillation of each pulse. Matches the recordings released by the Associated Press. The Associated Press recording also shows the frequency attenuation of a single pulse, which is the acoustic characteristic unique to the sound. Although the time pulse structure in the recording is different from any insect, When playing a humming sound and playing it indoors with a speaker, the interaction of the pulse reflection produces a sound that is no different from the recording of the Associated Press… ”
The two pointed out in the analysis report that the sound of the West Indian macaque was similar to the noise recorded by the diplomat in many details. As for the nuances between the two, Stubbs guessed. This may be because the diplomat’s noise audio is recorded in the house, while the macaque’s audio is recorded in the wild So he played in indoor cricket field recorded sound files, chirping through the walls, ceiling and floor after the rebound, and sure enough there was a similar uneven pulse sound. Is very similar to the voice recorded by American diplomats in Cuba
(picture two scientists from the paper).
The West Indian macaque itself is distributed in the Florida Keys, Grand Cayman Islands and Jamaica. A close relative of this species is distributed in Cuba, which belongs to the Caribbean, and Stubbs suspects that the species itself is also distributed in Cuba
As early as 1957, a Dominican entomologist once mentioned that “the male of this insect can continue to emit a ‘sweet’ sound, and its volume and penetration are large enough to make the whole room change. It’s noisy.” And Stubbs recorded the sound of this insect in Costa Rica. Also said that the sound was “incredibly loud, even in a diesel truck that travels at 65 kilometers per hour.”Gerald Pollack, a scholar who studies insect-voice communication at McGill University in Canada, praised their research as “a hypothesis with sufficient arguments,” and “everything seems to make sense.”
But Stubbs himself stressed that his research does not prove that these diplomats have not been attacked at all, but the initial allegations of “sonic weapons” may only be diverting attention. “It is entirely possible that they are because of The thing is sick or attacked by other means. “Stubbs said this.
and Responsible for medical examination of US diplomats. ‘s director of the Center for Brain Injury and Rehabilitation at the University of Pennsylvania, Dr. Douglas Smith, questioned the study, saying While some patients heard a series of sounds, other patients did not report any abnormal sounds. He also questioned that a single recording could not reveal too much information. He said that he did not rule out that someone actually heard it. The possibility of tweets, but he thinks this has nothing to do with the real injuries of diplomats.
In addition to the United States, the Canadian government has followed the United States to say that its diplomats in Cuba “have a problem of deafness”. In 2018 In June, the United States also came to “touch porcelain” in China, saying that employees of US embassies and consulates in China were also affected by the so-called “sound wave”, which is exactly the same as in Cuba. Chinese Foreign Ministry spokesperson Hua Chunying pointed out that it was straightforward. The relevant Chinese authorities have conducted a serious investigation in a very responsible manner, but did not find any organization or individual to implement such an impact. The reasons and clues that led to the situation in the US are now. After the US did not respond