An echoing cricket call was responsible for the sound in the released recording of persistent, high-pitched sound that American diplomats in Cuba heard during the sonic attack at the embassy in 2016, according to a new study (http://bit.ly/2M7klB0). Two scientists, Alexander Stubbs, a graduate student in integrative biology at the University of California, Berkeley, and Fernando Montealegre-Zapata, PhD, a professor of sensory biology at the University of Lincoln in the United Kingdom, studied a recording of said sound published by the Associated Press and compared it with field recordings of North American insects. They found that the calling song of the Indies short-tailed cricket matches, in nuanced detail, the AP recording in duration, pulse repetition rate, power spectrum, pulse rate stability, and oscillations per pulse. They also discovered that the AP recording exhibits frequency decay in individual pulses, which is a distinct acoustic signature of cricket sound production. This finding disproves the popular theory that the sound that the American diplomats reported hearing was generated by a sonic weapon. The study authors therefore concluded that more rigorous research is needed to identify the source of the ailments that the American diplomats experienced.
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