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This is Scientific American 60 Second Science. I'm Emily Schwang.

Oh! swing. from the rainforest. That's Mark Holdareed, the University of Bristol in the UK. He

specializes in bioacoustics, how animals produce sound and communicate with the

sounds they make. In the recording you just listen to,

Holdaree remove the sounds we humans can hear

and reduce the frequencies of the sounds we normally wouldn't hear

so that they're audible to our ears.

Rainforest is a very noisy environment.

Insect sounds, birds sounds, leaves rust leaves rustling and all of this makes it harder for you to detect something you want to hear.

Holdareed is particularly interested in sounds from the ultrasonic range.

These are frequencies our ears can't detect,

but they come in loud and clear for a sword-tailed cricket and Panama.

Here's their habitat, slowed down so we can hear it.

...