Apple has been granted a patent for smart headphones that can do more than simply pump tunes into your head.
Spotted by Apple Insider, the patent describes how the headphones could detect head gestures in addition to keeping tabs on your perspiration levels, activity, heart rate and temperature.
If that sounds familiar to you then you've probably already read about the wireless Dash Kickstarter headphones which manage to cram all those health-tracking powers into two tiny ear buds.
It's worth bearing in mind that the patent was filed way back in 2007, before smart wearables exploded onto the scene, but it shows that Apple has been toying with the idea of fitness tracking for quite some time.
Coupled with the flood of rumours surrounding the iWatch's multiple fitness sensors and iOS 8's Healthbook, Apple looks set to unleash its special blend of tech magic into the fitness tracking market in the not-too-distant future.
Whether or not the iPhone 6's headphones will be smarter than your average buds however, remains to be seen.