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Tag: "ultrasonic" at biology news

A probe, not an echo

...the use of multi-band analysis with sub-millimeter ultrasonic transducers in transmission mode, rather than the ...ent. The HUTT system transmits an extremely short ultrasonic pulse (about 250 nanosecond) of 4-12 megahertz frequency (far above human hearing) and picks up the ...

Frog’s ear canal may provide insights for understanding human hearing loss

...must be extremely lightweight in order to transmit ultrasonic vibrations to the inner ear. The presence of an ea... high-pitched, birdlike calls that extend into the ultrasonic range. What remained to be tested was whether the ultrasounds were a byproduct of the frog's sound-p...

Researchers develop portable 'vein finder' for faster, more accurate injections

...c skin and tissue, blood is a moving substance, so ultrasonic waves reflected from blood vessels have different ...into the reflector. Then the reflector directs the ultrasonic waves into the patient's skin at a slight angle. The device can determine the direction of blood flo...

Rare Chinese frogs communicate by means of ultrasonic sound

...rd, then that the species produces very high-pitch ultrasonic sounds. Now scientists say that these concave-eare...test if the frogs actually communicated with their ultrasonic sounds, Feng and colleagues returned to China with their recording equipment and a special device th...

New 'self-exploding' microcapsules could take sting out of drug delivery

...hich release their drug cargo only when exposed to ultrasonic waves or another external trigger, the new system relies on internal mechanisms to do the same job. Each of the new microparticles features a biodegradable gel core that is surrounded by a lipid membrane. As the gel biodegrades, pressure builds up in...

To elude bats, a moth keeps its hearing in tune

...en known for over 50 years that moths can hear the ultrasonic hunting calls of their nocturnal predator, the bat. Moth ears are among the simplest in the insect world—they have only two or four vibration-sensitive neurons attached to a small eardrum. Previously, it was thought that these ears were only partiall...

New system could drastically reduce herbicide use

...on system." Although the robot is equipped with ultrasonic sensors that go all the way around the machine, "we're going to try and use only the camera vision for navigation," said Jeon, "which makes it a lot more difficult." The robot stands a little more than two feet tall, is 28 inches wide and almost f...

In young mice, gregariousness seems to reside in the genes

... At the same time, the researchers tuned in to the ultrasonic chattering that mice use to communicate with each other. For the more socially predisposed animal, gregariousness was the order of the day, says Lahvis: "A young mouse will seek social interaction and avoid isolation. The social life of these anim...

Moths mimic sounds to survive

...that bats use to locate prey, the tiger moths make ultrasonic clicks of their own. They broadcast the clicks from a paired set of structures called “tymbals.” Many species of tiger moth use the tymbals to make specific sounds that warn the bat of their bad taste. Other species make sounds that closely mimic ...

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