Borehole acoustic imaging techniques have become a crucial tool in subsurface investigations, combining advances in signal processing and sensor technology to produce detailed images of geological ...

To control the movements of particles within acoustic wells, another kind of energy is required. These are in the form of electrical fields, generated by using microscopic electrodes.

To do this, we used mathematical tools which consider the way acoustic-gravity waves behave. As these waves travel through the water, they disperse. This means that groups of waves created by a ...

A new capability to predict the acoustic signatures of all classes of naval vessels has been developed by Australia’s Defence Science and Technology Group (DST) in partnership with Frazer-Nash. The ...

And although they are “acoustic” waves, they are below the range of human hearing – the only way to pick up and record them is using hydrophones, special microphones that work underwater.