Turtles have three ears, but they're not visible. Two ears are inside small holes on the sides of the head, and the third ear is in the nose.
Turtles don't have sensitive hearing. They have no outer ears to draw in sounds, no ear drums to detect a wide range of sound and they have small hearing centers in their brains. However, they do have thin flaps of skin covering internal ear bones that enable them to perceive vibrations and low-frequency sounds. This is how they can sense the air displacement from approaching predators or the ground vibrations from nearby leaping frogs. While they can’t hear birds chirping, they can hear the lower-frequency sound of wings flapping out of the bushes. Turtles hear as well as they need to and rely on their more powerful senses of vision and smell for survival.