Transducers

When people are attempting to clean up oil spills at sea, one of the key things they need to know is the amount of oil that's been spilled. In order to make that process easier, scientists have developed an ROV that does the job by measuring the thickness of oil slicks from below the surface.

Researchers from MIT, Carnegie Mellon University and Pennsylvania State University have developed a novel technique of separating cells with the use of a gentle sound wave, with the possibility of the system being used to isolate rare tumor cells synonymous with cancer.

Scientists at the University of California Berkeley claim to have produced a "bottle" beam of acoustic energy that can precisely direct sound waves through open air without the need for waveguides or other mechanical assistance, promising applications in acoustic cloaking and levitation.

Scientists have created an underwater speaker that could be used to communicate with dolphins.