News tagged with sound

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How birds get by without external ears

Unlike mammals, birds have no external ears. The outer ears of mammals play an important function in that they help the animal identify sounds coming from different elevations. But birds are also able to ...

Dec 11, 2014
5 / 5 (2) 0

Researchers build acoustic tractor beam

(Phys.org) —A team of researchers with members from the U.K., Scotland and the U.S. has built a functioning acoustic tractor beam in a lab—one that is able to pull objects of centimeter size. In their ...

May 08, 2014 report
4.4 / 5 (28) 2

How the kettle got its whistle

(Phys.org) —Researchers have finally worked out where the noise that makes kettles whistle actually comes from – a problem which has puzzled scientists for more than 100 years.

Oct 25, 2013
4.7 / 5 (38) 11 | with audio podcast