To help first responders find people during disasters, researchers are training a search and rescue drone to listen for human screams — and then locate their source.

Help from above: Drones are proving incredibly useful for search and rescue operations. If a person is lost, sending a drone over an area to look for them is faster than trying to cover the same ground with people or dogs.

It’s also safer to use a search and rescue drone if the person happens to be trapped in a disaster zone, such as the site of a wildfire or in a collapsed building.