Abstract: Multi-energy generator apparatus, methods, and systems are disclosed. One multi-energy apparatus comprises: a housing with a biocompatible skin interface comprising a first skin contact operable to transmit a first energy in a signal direction toward skin of a user, and a second skin contact that surrounds the first skin contacting portion and is operable to transmit a second energy in the signal direction toward the skin; and a plurality of PCBs that are operatively sealed in the housing, the plurality of PCBs comprising a first generator operable to output the first energy to the first skin contact for transmission to the skin, a second generator that surrounds the first generator and is operable to output the second energy to the second skin contact for transmission to the skin, and a controller operable to activate the first generator and the second generator.

Abstract: Numerous aspects of communication devices, methods, and systems are described in this application. One aspect is an apparatus comprising an energy generator comprising: a plurality of generator elements operable to output a plurality of different energy types in a signal direction toward a physiologic tissue; a printed circuit board that mechanically supports and electrically connects the plurality of generator elements to each other; each generator element of the plurality of generator elements being independently operable, when the energy generator is positioned relative to the physiologic tissue, to communicate with different nerves associated with the physiologic tissue by outputting a different portion of an energy signal in the signal direction toward the physiologic tissue with one energy type of the plurality of different energy types.

Abstract: The subject matter described herein provides systems and techniques for enhancing a user’s performance. In particular, the physiological characteristics of the user can be altered toward target characteristics to bring about a particular physiological state in the user. Multiple physiological signals of the user may be sensed. Physiological characteristics indicative of a physiological state of the user may be determined. A differential between the physiological characteristics and selected target physiological characteristics may be determined. A selected energy signal associated with a correction action may be communicated to nerves associated with the user’s skin by outputting, using an energy generator, the energy signal toward the skin with one or more different energy types based on the differential. This may allow a particular targeted physiological state to be more rapidly brought about in the user.