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| UPDATED: 15:11, Wed, Dec 23, 2020 Link copied Sign up for FREE for the biggest new releases, reviews and tech hacks SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they ll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. Researchers on Antarctica have long been puzzled by the presence of mysterious ultrasonic signals originating from beneath the icy depths. But they now know Weddell seals are the acoustic animal responsible for strange noises coming from below the ice. ....
Under Antarctica s ice, Weddell seals produce ultrasonic vocalizations EUGENE, Ore. Dec. 21, 2020 Weddell seals are chirping, whistling and trilling under Antarctica s ice at sound frequencies that are inaudible to humans, according to a research team led by University of Oregon biologists. Two years of recordings at a live-streaming underwater observatory in McMurdo Sound have captured nine types of tonal ultrasonic seal vocalizations that reach to 50 kilohertz. Humans hear in the sonic range of 20 to 20,000 hertz, or 20 kilohertz. The discovery is detailed in a paper published online Dec. 18 ahead of print the Journal of the Acoustical Society of America. Weddell seals (Leptonychotes weddelii), the world s southernmost-ranging mammal, thrive under the continent s sea ice, using their large teeth to create air holes. They can dive to 600 meters in search of prey and remain submerged for 80 minutes. Researchers had first identified 34 seal call types at sonic f ....