Crickets

How in the world do crickets make such a loud noise? I KNOW how they do it, but a wing and a leg should not be able to generate so much noise, especially at night!!! We have one near our bedroom window and that thing is so noisy. It drives me NUTS! They are also impossible to find which makes them exasperating. I tried to show one to Mia this week but it could feel us coming and would get quiet every time we came near. I love God's creations, but sometimes they can be annoying. Does anyone else have the illusive insect near their window? If so, I feel your pain. LOL