Bats versus dolphins – the ultimate battle of sonar systems

Active sensors are incorporated into a number of technologies, such as meteorology devices and self-driving cars, and use the echo from sound, radio or light waves to locate objects. But despite nearly a century of development, ...

For pollock surveys in Alaska, things are looking up

Shelikof Strait, in the Gulf of Alaska, is an important spawning area for walleye pollock, the target of the largest—and one of the most valuable—fisheries in the nation. This year, a team of NOAA Fisheries scientists ...

Robotic sonar system inspired by bats

Rolf Mueller, an associate professor of mechanical engineering in the College of Engineering at Virginia Tech, has developed a prototype of a dynamic sonar system inspired by horseshoe bats.

How fish fossils can help us build better submarines

The ocean, which covers the vast majority of the world's surface, holds many secrets. For more than a year a multinational team has tried to find the missing Malaysia Airlines flight MH370 on the bottom of it – without ...

Ultrasound technology made to measure

The range of uses for ultrasound is gigantic; the applied technologies are just as diverse. Researchers are now covering a wide range of applications with a new modular system: From sonar systems to medical ultrasound technologies ...

Whales hear us more than we realize

Killer whales and other marine mammals likely hear sonar signals more than we've known. That's because commercially available sonar systems, which are designed to create signals beyond the range of hearing of such animals, ...

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