Bone conduction. That’s right, music transmitted from your player to your brain via vibrations in your skull. AfterShokz has been a leader in this arena for several years now, and their latest device, the Bluez 2 ($100; aftershokz.com) makes a solid jump in performance and functionality. Listening to music has always been a great way to extend your workout tine, to block out all the unwanted noise of track, and chitter chatter. Riding your bike or even riding the bus the earbuds are amazing for sound and noise reduction.