Imagine an elephant with an extra large sized pair of ears. These magnificent creature, no bigger than a mouse, can flap their ears like a hummingbird and fly in the sky. They have hollow bones, lots of muscles in each ear, and each ear is roughly twice their body length.
Assuming they can fly in any direction, hovering in place and even perform the moonwalk midair, these pair of ears would need to flap continuously in quick succession and, thus, generate heat and sound. The complex network of blood vessels spreading underneath the entire surface of the ear helps to cool the animal but what about the noise? I'm sure it will confuse the animal.
How can such a creature filter out noise coming from the rapid flapping of its ears while staying airborne?
Technology is prohibited and please refrain from using magic. Actually, the ancestors used the ears to keep cool and, later on, these ears become larger and more muscular. It is probably accidental that they are able to fly into the sky.