Hey, guys, welcome back to Swell. I am Faiz, and I'm going to discuss about the secret of a tigers roar. A tigers intimidating roar has the power to paralyze the animal that hears it, and that includes even the experienced human trainers. A tiger sore can be heard from a distance of 3 km. Humans can hear frequencies from 20 Hz to 200 Hz. But whales, elephants, rhinos and tigers can produce sounds below 20 Hz