headset

Etymology

From head + set.

noun

1. A pair of headphones or earphones, or a singular headphone or earphone, typically with an attached microphone.
2. Any electronic device worn on the head.
   If you've just acquired a Google Glass headset for £1,000, don't show it off at the movies. UK cinemas are to ban the headsets over fears that the gadgets can be used to make pirate copies of Hollywood blockbusters. 29 June 2014, Adam Sherwin, “UK cinemas ban Google glasses over piracy risk”, in The Independent
3. (cycling) On a bicycle, the system of bearings that connects the fork to the frame.