Bee Humming Explained: How and Why Bees Make That Sound.

The bee’s humming is made by the movement of its wings. Its wings move very quickly and as they move to and fro they set the air moving and it is the waves in the air that make them hum. The vibrations in the air made by the bee’s wings are of a rate that is within the range of their hearing, if the bee is near enough, and so we hear a humming.