An example playback device includes a first interface for receiving a first audio signal from a first audio source; a second interface for receiving a second audio signal from a second audio source; and a processor configured to: cause the playback device to playback the second audio signal; determine that the first audio signal is present at the first interface; in response to determining that the first audio signal is present at the first interface, (i) cease playback of the second audio signal being played by the playback device and (ii) cause the playback device to playback the first audio signal; receive an instruction to stop the playback device from playing the first audio signal while the first audio signal is still present at the first interface; and arm the playback device such that a subsequent presence of the first audio signal at the first interface causes the playback device to play the first audio signal.

Systems and methods may provide for determining a usage configuration of a wearable device and setting an activation state of an air conduction speaker of the wearable device based at least in part on the usage configuration. Additionally, an activation state of a tissue conduction speaker of the wearable device may be set based at least in part on the usage configuration. In one example, the usage configuration is determined based on a set of status signals that indicate one or more of a physical position, a physical activity, a current activation state, an interpersonal proximity state or a manual user request associated with one or more of the air conduction speaker or the tissue conduction speaker.

A hierarchical approach is provided to integrate functions and components into the various systems and subsystems within a distribution network, including standardization of modular and scalable power electronics power blocks with embedded diagnostics and prognostics.

A hierarchical approach is provided to integrate functions and components into the various systems and subsystems within a distribution network, including standardization of modular and scalable power electronics power blocks with embedded diagnostics and prognostics.

Various energy harvesting and control techniques are used to power and control electronic accessories from the audio output channels and microphone input channel of mobile digital devices while preserving audio input and output functionality. One technique uses one of the stereophonic audio channels to generate power, and the other in conjunction with the microphone jack to enable bi-directional communications while preserving audio input and output. Another technique allows a low powered electronic accessory with bi-directional communications to be supported while simultaneously supporting audio input & stereo output. These techniques facilitate the ability to play music, narration and instruction and to receive oral responses and instruction with no perceived loss or gaps, even while using the audio jack of a mobile digital device to harvest energy and bi-directional communication.

A mobile pole of a switchgear that includes a pole cage comprising two parallel lateral walls, at least one of which delimits at least one centering hole defining a centering axis and an interior volume; a support leg, the pole cage being constrained to rotate with the support leg; and two flanges, each being configured to be connected to a respective lateral wall of the pole cage and including fixing members being configured to cooperate with the at least one centering hole, at least one of the fixing members being a load take-up device including a fixing part defining an insertion axis and a centering part adapted to cooperate with the fixing part and being configured to be inserted at least partly into the interior volume of the at least one centering hole with which said at least one of the fixing members is configured to cooperate so that the insertion axis of the centering part is aligned with the centering axis of the centering hole with which said at least one of the fixing members is configured to cooperate.

A mobile pole of a switchgear that includes a pole cage comprising two parallel lateral walls, at least one of which delimits at least one centering hole defining a centering axis and an interior volume; a support leg, the pole cage being constrained to rotate with the support leg; and two flanges, each being configured to be connected to a respective lateral wall of the pole cage and including fixing members being configured to cooperate with the at least one centering hole, at least one of the fixing members being a load take-up device including a fixing part defining an insertion axis and a centering part adapted to cooperate with the fixing part and being configured to be inserted at least partly into the interior volume of the at least one centering hole with which said at least one of the fixing members is configured to cooperate so that the insertion axis of the centering part is aligned with the centering axis of the centering hole with which said at least one of the fixing members is configured to cooperate.

A method and apparatus for adapting an electronic device to receive digital television broadcast signals is disclosed. The device comprises a switch commandable to interpose one or more matching networks as in the RF signal path according to a channel command to match an integrated headset antenna to the tuner receiving the RF signals.

A second duct for guiding air outside an image forming apparatus A to a charging device includes: a first flow passage; a second flow passage bent from the first flow passage and extending in a direction orthogonal to a rotational direction and a rotational axis direction of a photosensitive drum, the second flow passage being provided with an outlet; and a plurality of flow dividing plates provided in the second flow passage, the plurality of flow dividing plates being disposed in parallel along the rotational axis direction and forming a third flow passage between the flow dividing plates adjacent to each other, in which a relationship between a length in the orthogonal direction and a length in the rotational axis direction of the third flow passage is a predetermined relationship.

A retrofit kit for installing an updated electrical power switch box in a facility power station. The retrofit kit includes an adaptor support frame for attaching to a support structure of the facility power station and for a preselected or predetermined depth positioning of the updated electrical power switch box relative to the three line side bussings and the three load side bussings of the facility power station. The retrofit kit also includes adaptor bars that overlap with and connect the breaker stabs of the updated electrical power switch box to the bussings, and include three line side adaptor bars that connect the three line side breaker stabs to the respective three line side bussings, and three load side adaptor bars that connect the three load side breaker stabs to the respective three load side bussings.