News tagged with sound waves

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Unlocking the brain's secrets using sound

(Phys.org) —The brain is a reclusive organ. Neurons the cells that make up the brain, nerves, and spinal cord communicate with each other using electrical pulses known as action potentials, but their interactions are complicated ...

Jan 22, 2014
4 / 5 (9) 3 | with audio podcast

Designing an acoustic diode

Most people know about ultrasound through its role in prenatal imaging: those grainy, grey outlines of junior constructed from reflected sound waves. A new technology called an "acoustic diode," envisioned ...

Nov 01, 2013
4.5 / 5 (24) 0 | with audio podcast

Frogs without ears hear with their mouth

Gardiner's frogs from the Seychelles islands, one of the smallest frogs in the world, do not possess a middle ear with an eardrum yet can croak themselves, and hear other frogs. An international team of scientists ...

Sep 02, 2013
4.8 / 5 (4) 2 | with audio podcast

A layer of tiny grains can slow sound waves

In some ways, granular material—such as a pile of sand—can behave much like a crystal, with its close-packed grains mimicking the precise, orderly arrangement of crystalline atoms. Now researchers at ...

Aug 05, 2013
5 / 5 (2) 2 | with audio podcast

Sound bullets in water

Sound waves are commonly used in applications ranging from ultrasound imaging to hyperthermia therapy, in which high temperatures are induced, for example, in tumors to destroy them. In 2010, researchers at Caltech led by ...

Nov 19, 2012
5 / 5 (9) 0 | with audio podcast