Apple has been rumored to work for a pair of own headsets for a while, but the details of the rumored product have been quite slim beyond the basic concept. A newly-approved patent, entitled "System and Method for Auto-Ear Headphone Earwire," suggests what Apple is planning. It describes a pair of headphones that are reversible, and automatically adjust which ear paws are right or left based on how to add them, via 9to5Mac .
The claims describe a system wherein each ear cup would have five microphones on it to be used to determine which earloop is through a variety of complicated methods involving comparison of relative microphone inputs.
When the headsets have decided for their location, the patent also describes how the headphones can use these micro frames to pull off a similar beam-shaped trick like HomePod, using a microphone to capture your voice and another to interrupt background noise so you can be clearly heard.
The patent focuses only on the technology used to determine which ear cup is on the right ear for speech detection. But probably Apple can use reversible nature to play the right right / left stereo signals to the right ear when it is already established which ear is which one.
However, as is always the case with Apple patents, there is no indication that the company will actually use this technology in a product. We do not even know if Apple's headphones are genuine. But if they act, they may get some nice tricks.