What else, it can automatically alert doctors if a dangerously high reading is taken. If we believe Secret, an anonymous gossip app popular in Silicon Valley, Apple is set to launch such earbuds that are also expected to contain a tiny tracking device so they can tell the user where they are if lost.

Apple's headphones could monitor the pulse of runners and automatically track their health and performance.

According to a patent by Apple, the fitness monitoring system is built in a set of headphones. The embedded activity sensor can pick up temperature, perspiration and heart rate data, among other metrics.

"The phone stores the data in a similar way to thumbprint point data, fully encrypted and nothing identifiable," the report added. The headphones are expected to work with Apple's much rumoured iWatch.


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