Articles on Acoustics

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The Cape peninsula moss frog is smaller than 20mm and is, therefore, hard to monitor. Francois Becker

How we learned to listen to elusive, threatened frogs

A robust technique using the wonders of digital media has helped researchers understand how threatened species like frogs are faring on our globally changing planet.
Illustration of the acoustic force fields created by the 64 speakers beneath the red object – strong enough to hold or move it. Asier Marzo, Bruce Drinkwater and Sriram Subramanian

How we invented a Star Trek-style sonic tractor beam

A millimetre-sized object has been levitated and moved around in mid-air using nothing but sound waves.

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