Researchers at Duke University have shown both theoretically and experimentally a device that is capable of providing acoustic ‘cloaking’ at frequencies between 1kHz-4kHz. The demonstration works for very directional sound waves.

More information can be found on the BBC News web site.

Researchers at Minnesota’s Mayo Clinic have developed a technique that uses low frequency sound to vibrate internal organs and when used with a Magnetic Resonance Imaging scanner (MRI) can be used to determine the elasticity or stiffness of internal organs, which is an indicator that something is wrong.

This new technique, called magnetic resonance elastography (MRE), was commercialised by GE Healthcare. They released their new device called MR-Touch, which is the first commercial application of MRE technology, which the company has licensed from the Mayo Clinic.

To read more about this story visit the Scientific American web site.

Researchers at Cornell University have developed a portable high intensity ultrasound system. They have built a small battery powered demonstration device.

For more information, read their journal article, “Development of a portable therapeutic and high intensity ultrasound system for military, medical, and research use“

Federal Mogul have developed an acoustic liner that is made from recycled materials including cardboard, carpet fibres, and other fabrics. The first application will be the 2010 Buick LaCrosse luxury sedan.

For more information, read the press release on the Federal Mogul web site.

A conference is currently underway on the topic of Energy Harvesting from sources such as vibration, wind, sun and others.

The Energy Harvesting Journal has a good commentary on the conference with extracts from experts in the field.

Raytheon has won a $US19m contract from the US Defense Advanced Research Projects Agency to develop a vehicle mounted land mine detection system that uses a laser radar vibration sensor.

For more information read the news release on the Raytheon web site.