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This is Scientific Americans' 60-second science. I'm Jason Goldman. Not too long ago, we thought that only humans could make and use tools. Then Jane Goodall watched a chimpanzee called David, take a small twig, snap the leaves off, stick it into a termite mound, and lick the insects off the stick.

Seems some animals also made and used tools.

That observation was in 1960.

Since then, the club of tool users has expanded to include a wide range of primates, birds,

marine mammals, and others. And now, an insect. Maybe.

Tree crickets use sound to attract mates. And they also fashion and use baffles, sound controllers,

made of leaves, to produce sound more efficiently. It's a behavior that's been known since at least 1975, but nobody ever

really tried to figure out how and why the bugs use the baffles. So the way that tree crickets sing

is to raise their wings and vibrate the wing back and forth. This causes sound to come off each surface of the wing. So the front face of the

wing and the back face of the wing. University of Toronto biologist, Natasha Matre. But sound waves

coming off the front of the wings and the sound waves coming off the back of the wings are out of

phase with each other.

The two sounds interfere with each other, making the call quieter.

To make a baffle, the cricket carves a small hole in the center of a leaf and sticks its body halfway through.

The baffle absorbs the sound coming from the back of the wings,

and therefore lets the sounds coming from the front sides to come through loud and clear.

And this prevents what we call acoustic short circuiting, and therefore they make more sound.

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