Sometimes, the most important sounds are those that cannot be heard.
—a technique that may reduce the need to approach circumspect critters and place physical trackers on them.
This collection of infrasound waves, which are technically known as microbaroms, have been referred to as the “.” Most researchers want to drown it out. “We try to get rid of the microbarom signal, because we’re interested in explosions,” Iezzi says. In short order, the researchers built minuscule infrasound sensors and fitted them into pouches—packages no more hefty than a TV remote. As fun as it may be to visualize these bags being lugged about the way a school kid carries a backpack, that would have been needlessly complicated. Instead, the pouches were simply stuck to the backs of the avian assistants with some duct tape.
So in the future, when it comes to detecting infrasound, will cyberpunk albatrosses become the new industry standard? “This is a good proof of concept,” says Lamb. But using wild animals to conduct scientific labor in the long-term is an ethical minefield that few would dare to cross—such prolonged and intensive contact with humans may risk triggering changes in the animals’ long-term behavior.
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