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Dinosaurs Hearing Test

06.06.2006

What sound frequencies were available to hearing dinosaurs? The German paleontologist Otto Gleich from the University of Regensburg undertook to find out.

He compared the sizes of the bone parts of the hearing aid preserved in fossils in modern birds, Archeopteryx and two dinosaurs - the Allosaurus, which weighed one and a half tons, and the Brachiosaurus (75 tons).

The larger the details of the inner ear, the lower the range of frequencies perceived by it. Archeopteryx perceived sounds in the same range that modern birds hear (whether Archeopteryx himself sang remains unknown). Allosaurus heard sounds best at 1100 hertz, and the highest sound it could hear was 3000 hertz. Brachiosaurus best heard sounds with a frequency of about 700 hertz, and above 2400 hertz did not hear anything.

It can be assumed that dinosaurs, like modern elephants, perceived infrasound.

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