An array of sensitive microphones in "Apple Glass" may detect audio that's difficult to hear, or to precisely locate, and direct the wearer where to look. "Apple Glass" may point users toward where sounds are originating (source: Angelo Libero Apple has previously applied for patents regarding sound quality in "Apple Glass," and making 3D audio for it. A newly-revealed patent application shows that Apple is also looking at what "Apple Glass" can do with the audio its microphones hear. "Audio-Based Feedback for Head-Mountable Device," is concerned with detecting sounds, and then informing the wearer of them. That's if the device has these microphones -- the patent is careful not to say that "Apple Glass" or any specific device will have them, only that they could.