Abstract: An in-ear device includes a housing shaped to hold the in-ear device in an ear of a user, and an audio package, disposed in the housing, to emit augmented sound. A first set of one or more microphones is positioned to receive external sound, and a controller is coupled to the audio package and the first set of one or more microphones. The controller includes a low-latency audio processing path, digital control parameters, and logic that when executed by the controller causes the in-ear device to perform operations. The operations may include receiving the external sound with the first set of one or more microphones to generate a low-latency sound signal; augmenting the low-latency sound signal by passing the low-latency sound signal through the low-latency audio processing path to produce an augmented sound signal; and outputting, with the audio package, the augmented sound based on the augmented sound signal.

Abstract: In some embodiments, an ear-mounted sound reproduction system is provided. The system includes an ear-mountable housing that sits within the pinna of the ear and occludes the ear canal. In some embodiments, the ear-mountable housing includes a plurality of external-facing microphones. Because the external-facing microphones may be situated within the pinna of the ear but outside of the ear canal, the microphones will experience some, but not all, of the three-dimensional acoustic effects of the pinna. In some embodiments, sound is reproduced by an internal-facing driver element of the housing using a plurality of filters applied to the signals received by the plurality of external-facing microphones to preserve three-dimensional localization cues that would be present at the eardrum in the absence of the housing, such that the housing is essentially transparent to the user. In some embodiments, techniques are provided for deriving the plurality of filters.

Abstract: In some embodiments, an ear-mounted sound reproduction system is provided. The system includes an ear-mountable housing that sits within the pinna of the ear and occludes the ear canal. In some embodiments, the ear-mountable housing includes a plurality of external-facing microphones. Because the external-facing microphones may be situated within the pinna of the ear but outside of the ear canal, the microphones will experience some, but not all, of the three-dimensional acoustic effects of the pinna. In some embodiments, sound is reproduced by an internal-facing driver element of the housing using a plurality of filters applied to the signals received by the plurality of external-facing microphones to preserve three-dimensional localization cues that would be present at the eardrum in the absence of the housing, such that the housing is essentially transparent to the user. In some embodiments, techniques are provided for deriving the plurality of filters.

Abstract: A photovoltaic power system includes a photofuel having a molecular structure to emit light, and a receptacle including the photofuel disposed within. One or more photovoltaic cells are positioned within the receptacle to receive light emitted from the photofuel, and a negative electrode is coupled to the one or more photovoltaic cells. A positive electrode is coupled to the one or more photovoltaic cells to produce an electrical potential between the negative electrode and the positive electrode when a photocurrent is generated by the one or more photovoltaic cells in response to the one or more photovoltaic cells receiving the light emitted from the photofuel.

Abstract: In some embodiments, an ear-mounted sound reproduction system is provided. The system includes an ear-mountable housing that sits within the pinna of the ear and occludes the ear canal. In some embodiments, the ear-mountable housing includes a plurality of external-facing microphones. Because the external-facing microphones may be situated within the pinna of the ear but outside of the ear canal, the microphones will experience some, but not all, of the three-dimensional acoustic effects of the pinna. In some embodiments, sound is reproduced by an internal-facing driver element of the housing using a plurality of filters applied to the signals received by the plurality of external-facing microphones to preserve three-dimensional localization cues that would be present at the eardrum in the absence of the housing, such that the housing is essentially transparent to the user. In some embodiments, techniques are provided for deriving the plurality of filters.

Abstract: A system to optically measure an ear includes a controller with logic that when executed by the controller causes the system to perform operations. Operations may include capturing the one or more images of the ear using the one or more image sensors, and generating image data from the one or more images. 3D keypoints of the ear are calculated from the image data, and a 3D model of the ear is generated using the 3D keypoints.

Abstract: An in-ear device includes a housing shaped to be held in an ear of a user, and be positioned around a canal of the ear so the canal is unobstructed by the in-ear device, and an audio package positioned within the housing to project sound into the canal when the in-ear device is disposed in the ear. A controller is disposed in the housing and coupled to the audio package, and the controller includes logic that when executed by the controller causes the in-ear device to perform operations, including emitting the sound from the audio package towards the canal of the ear.

Abstract: A system for charging in-ear device battery packages includes a housing with a lid and a body, and a hinge system attaching the lid to the body. A charging unit is shaped to fit in the body, and includes a battery. One or more slots are disposed in the body that are exposed when the lid is open. The one or more slots are shaped to receive one or more of the in-ear device battery packages, and charge the one or more in-ear device battery packages with energy stored in the battery.

Abstract: An in-ear device includes a housing shaped to hold the in-ear device in an ear, and an audio package, disposed in the housing, to emit sound. A tympanic membrane measurement unit (TMMU) is structured to measure a movement of a tympanic membrane in the ear caused by external sound received by the tympanic membrane, and a controller is coupled to the audio package and the TMMU. The controller includes logic that when executed by the controller causes the in-ear device to perform operations. The operations include measuring a movement of the tympanic membrane, and in response to measuring the movement of the tympanic membrane, outputting sound from the audio package to destructively interfere with the external sound received by the tympanic membrane.

Abstract: A photovoltaic power source includes a receptacle to receive a photofuel including a liquid, and one or more photovoltaic cells positioned within the receptacle to receive light emitted from the photofuel when the photofuel is in the receptacle. The photovoltaic power source also includes power circuitry coupled to the one or more photovoltaic cells to receive a photocurrent generated by the one or more photovoltaic cells when the one or more photovoltaic cells receive the light emitted from the photofuel. In response to the photocurrent, the power circuitry is coupled to output electricity.

Abstract: An in-ear device includes a molding shaped to hold the in-ear device in an ear, and an audio package configured to emit sound. The audio package is structured to removably attach to the molding. An electronics package is structured to removably couple to the audio package and removably attach to the molding. The electronics package includes a controller to control the sound output from the audio package.

Abstract: An in-ear device includes a housing shaped to hold the in-ear device in an ear of a user, and an audio package, disposed in the housing, to emit augmented sound. A first set of one or more microphones is positioned to receive external sound, and a controller is coupled to the audio package and the first set of one or more microphones. The controller includes a low-latency audio processing path, digital control parameters, and logic that when executed by the controller causes the in-ear device to perform operations. The operations may include receiving the external sound with the first set of one or more microphones to generate a low-latency sound signal; augmenting the low-latency sound signal by passing the low-latency sound signal through the low-latency audio processing path to produce an augmented sound signal; and outputting, with the audio package, the augmented sound based on the augmented sound signal.

Abstract: An in-ear device includes a housing shaped to be held in an ear of a user, and be positioned around a canal of the ear so the canal is unobstructed by the in-ear device, and an audio package positioned within the housing to project sound into the canal when the in-ear device is disposed in the ear. A controller is disposed in the housing and coupled to the audio package, and the controller includes logic that when executed by the controller causes the in-ear device to perform operations, including emitting the sound from the audio package towards the canal of the ear.

Abstract: A system to optically measure an ear includes a controller with logic that when executed by the controller causes the system to perform operations. Operations may include capturing the one or more images of the ear using the one or more image sensors, and generating image data from the one or more images. 3D keypoints of the ear are calculated from the image data, and a 3D model of the ear is generated using the 3D keypoints.

Abstract: An in-ear device includes a molding shaped to hold the in-ear device in an ear, and an audio package configured to emit sound. The audio package is structured to removably attach to the molding. An electronics package is structured to removably couple to the audio package and removably attach to the molding. The electronics package includes a controller to control the sound output from the audio package.

Abstract: An in-ear device includes a molding shaped to hold the in-ear device in an ear, and an audio package configured to emit sound. The audio package is structured to removably attach to the molding. An electronics package is structured to removably couple to the audio package and removably attach to the molding. The electronics package includes a controller to control the sound output from the audio package.

Abstract: A photovoltaic power system includes a photofuel having a molecular structure to emit light, and a receptacle including the photofuel disposed within. One or more photovoltaic cells are positioned within the receptacle to receive light emitted from the photofuel, and a negative electrode is coupled to the one or more photovoltaic cells. A positive electrode is coupled to the one or more photovoltaic cells to produce an electrical potential between the negative electrode and the positive electrode when a photocurrent is generated by the one or more photovoltaic cells in response to the one or more photovoltaic cells receiving the light emitted from the photofuel.

Abstract: A photovoltaic power source includes a receptacle to receive a photofuel including a liquid, and one or more photovoltaic cells positioned within the receptacle to receive light emitted from the photofuel when the photofuel is in the receptacle. The photovoltaic power source also includes power circuitry coupled to the one or more photovoltaic cells to receive a photocurrent generated by the one or more photovoltaic cells when the one or more photovoltaic cells receive the light emitted from the photofuel. In response to the photocurrent, the power circuitry is coupled to output electricity.

Abstract: Methods and systems for facilitating extraction of subterranean hydrocarbons from a geologic structure. The present methods include causing corrosion of a base metal within a geologic structure to produce a gaseous product to increase pressure and form fractures in the geologic structure. Some embodiments of the present methods include injecting a fluid composition comprising the base metal into a wellbore (e.g., into a geologic structure via the wellbore).

Abstract: A secondary battery includes: 1) a negative electrode compartment including a molten metal negative electrode material which includes K; 2) a positive electrode compartment; and 3) an electrolyte disposed between the negative electrode compartment and the positive electrode compartment, wherein the electrolyte is an ion-conducting solid electrolyte.