nuraloop

Nuraloop review: Smart sport buds, elevated
The Nuraloop sports buds offer personlized sound, excellent battery life and active noise cancellation, making them worthy Powerbeats rivals.
NuraLoop hands-on: Possibly the smartest earbuds around
Nura burst onto the headphone scene a couple of years ago with the Nuraphone. With its app-based hearing test for customized audio, haptic bass, noise cancellation and over-ear-but-still-in-ear design, it was clear the company never received its copy of the rule book. This was confirmed when it revealed its $199 NuraLoop buds that are both wired and wireless (depending on your preference), claim a solid 16 hours battery life (in Bluetooth mode) and, of course, come with the same automatic hearing test to adapt their sound to your hearing.
NuraLoop packs personalized sound into wireless buds
Nura's first headphones were certainly a conversation starter. The hybrid design mixed over-ear design, with in-ear buds. The wireless headset's main trick, however, was the built-in audio test that uses otoacoustic emissions to spot any weak spots in your hearing and adjust the sound to compensate -- like having glasses for your ears.