A tiger's roar peaks at around 18 Hz, just below the threshold of human hearing, which begins at 20 Hz. That gap is not a flaw in the tiger's design. It is the design. Infrasound at 18 Hz does not ...
As the Chinese Year of the Tiger draws to a close on 2nd February, TRAFFIC and WWF China are urging those concerned over the plight of wild Tigers to register their support at and make a Tiger roar.
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