The roar of a lion can be heard at a distance of 8 km Bashny.Net

The roar of the lion - it is one of the loudest sounds in nature. Awesome lion's roar causes compression and tremble with fear all the fauna at a distance of 8 km.

Volume lion's voice does not depend on the volume of the lungs. In fact, the lion is hardly ever used for the production of the respiratory system roar. The sound is generated because of its unusual structure of the vocal cords, containing two membranes and a special body fat. The vocal cords can vibrate lion horizontally, which greatly increases the sound volume.

via factroom.ru