mapkinase's Journal: Experts unveil 'cloak of silence'

BBC:

Being woken in the dead of night by noisy neighbours blasting out music could soon be a thing of the past.

Scientists have shown off the blueprint for an "acoustic cloak", which could make objects impervious to sound waves.

The technology, outlined in the New Journal of Physics, could be used to build sound-proof homes, advanced concert halls or stealth warships.

Abstract to original peer-reviewed paper:

This work proposes an acoustic structure feasible to engineer that accomplishes the requirements of acoustic cloaking design recently introduced by Cummer and Schurig (2007 New J. Phys. 9 45). The structure, which consists of a multilayered composite made of two types of isotropic acoustic metamaterials, exactly matches the conditions for the acoustic cloaking. It is also shown that the isotropic metamaterials needed can be made of sonic crystals containing two types of material cylinders, whose elastic parameters should be properly chosen in order to satisfy (in the homogenization limit) the acoustic properties under request. In contrast to electromagnetic cloaking, the structure here proposed verifies the acoustic cloaking in a wide range of wavelengths; its performance is guaranteed for any wavelength above a certain cutoff defined by the homogenization limit of the sonic crystal employed in its fabrication.

Sounds great... and a fear

[Shadow Wrought]

I would love to have that kind of insulation. I like quiet;-) But I also wonder if such technology can be used to further insulate from each other. I wonder whow much more dense people could be housed if you could never hear your neighbor?

Always the double edge with technology though.