The Libratone TRACK+ in-ear headphones adapt to the surrounding noise to provide enhanced noise cancellation.Libratone has announced a very sleek new product, the Libratone TRACK+ Wireless In-ear headphones. They have a very clean modern look while packing some incredible technology into a very thin form factor. Noise cancellation is not a common thing to see in small earphones, but they've still managed to integrate their very powerful 'citymix' adaptive noise cancellation technology into them.Adaptive noise cancellation essentially allows the user to control how sensitive they are to canceling out the noise around you, and it will adapt nicely to make a seamless experience. This technology is created by Libratone, and it's called "Citymix". There are four different settings for noise cancellation, and it will work well in every environment. A quiet or "hush" mode was also integrated to easily let sound through when you need to hear you're surroundings. The in-ear headphones als...