Animal bionics

Jellyfish's Wind-Earing

"Swallows fly low to clear the rain, and cicadas chirp in the middle of the rain and the sky clears up." There is a certain relationship between the behavior of living things and changes in the weather. Coastal fishermen all know that when fish and jellyfish living on the coast swim to the sea in groups, it indicates that a storm is coming

Jellyfish, also called jellyfish, is an ancient coelenterate that dates back to 5 Billions of years ago, it floated in the ocean. This animal has the instinct to predict storms. Whenever a storm comes, it swims to the sea to take refuge. On the blue ocean, the infrasound waves generated by the friction between air and waves are always a prelude to the coming storm. This kind of infrasound cannot be heard by human ears, but small jellyfish are very sensitive. Bionicists discovered that there is a thin handle in the vibrating cavity of the jellyfish's ear. There is a small ball on the handle. There is a small hearing stone inside the ball. When the infrasound wave before the storm hits the hearing stone in the jellyfish's ear, At this time, the listening stone stimulates nerve receptors on the wall of the ball, so the jellyfish hears the rumble of the approaching storm. \

Scientists imitated the method predicted by jellyfish and installed this instrument on the ship. When receiving the infrasound waves of the storm, the horn that rotates 360° can stop rotating on its own. The direction it points is the direction of the storm; the reading on the indicator can tell the intensity of the storm. This kind of predictor can predict storms 15 hours in advance, which is of great significance to the safety of navigation and fisheries.