In northern Kenya’s Samburu ecosystem and southern Kenya’s Amboseli National Park, researchers led by behavioral ecologist Michael Pardo from Colorado State recorded over 600 elephant calls. You may be familiar with their iconic trumpet-like calls, but elephants also produce low-frequency noises between 1 to 20 Hertz, too low for the human ear to hear. However, these so-called infrasounds can travel over vast distances as large as 10 kilometers (6 miles). The researchers then implemented a machine learning algorithm, which identified specific rumbles for 119 individual elephants, or close to 20% of cases. They separated rumbles from certain individuals by observing what elephants were separated from or approached the herd during these vocalizations. Read more here: