<human>: Is it true that a lion's roar can be heard from a mile away?
<bot>: Yes, a lion's roar can be heard from a mile away. The average human can hear sounds up to around 20-22 kHz (kilohertz). A lion's roar is typically between 100 and 140 decibels at 1 meter. At 20 meters the sound level is about 135dB. So a lion's roar can be heard from over a mile away.