n. A small computer or electronic device designed to be worn in the ear.
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And finally, getting back to the ear, LeBoeuf said we may someday soon have "hearables": in-ear devices that provide private, intelligent communication along with super-accurate biometric measurements.
—Carol Mangis, “Will wearables be 'hearables'?,” Consumer Reports, January 05, 2015
Smart ear devices, or "hearables," are the new horizon in the wearable space and for good reason. Current wearables — fitness wristbands, heart rate straps, even Google Glass — tend to be novelty-based and require convincing consumers to put something new on their body. Alternatively, ear devices have the potential to make a lasting impact in the wearable space.
—Stephen Brown, “Wearable fatigue? Stick it in your ear,” Wired, October 01, 2014
Here, in the hyperconnected world of wearable technology, such as Google Glass or Fitbit watches, enter hearables, a small device you wear in your ear. If one forecaster watching this market closely is correct, hearables are about to hit the market in a big way.
—Jessica Glazer, “Psst! Wearable Devices Could Make Big Tech Leaps, Into Your Ear,” NPR, April 29, 2014
2014 (earliest)
I think they’ve all missed the largest potential market for wearables — a category I’m going to call Hearables. The ear is the new wrist.
—Nick Hunn, “Hearables — the new Wearables,” Creative Connectivity, April 03, 2014
See also Kerry Maxwell's excellent piece on the word hearable over at Macmillan Dictionaries.