The device's blob-shaped center, which is suspended inside 16 aluminum fins, tackles two age-old annoyances common to external drives of this type: noise and vibration.
On an airplane, the noise-canceling claim is borne out, though a head-to-head comparison with a pair of Bose headphones suggests that the noise-canceling profile is somewhat different than the active-reduction type.
Police said there was a 57% reduction in "youth-related annoyance" compared to the three months before the trail, and a 51% fall in all anti-social type incidents, including drink-related offences, criminal damage and noise nuisance.