US Patent 8139801 Hearing aid glasses using one omni microphone per temple

Hearing glasses with a left temple and a right temple connected to a front portion supporting a pair of lenses, at least one temple with one single microphone and a processor connected to the single microphone. The single microphone is an omnidirectional microphone and located in the temple such that, when the hearing glasses are worn by a human's head where the at least one temple is at a predetermined side of the head, the single microphone can receive sound substantially unblocked by the head from sound sources both at a left and right frontal side of the head, as well as from one back side of the head corresponding to the predetermined side of the head.