Hat, helmet, and other headgear apparatus includes dry electrophysiological electrodes and, optionally, other physiological and/or environmental sensors to measure signals such as ECG from the head of a subject. Methods of use of such apparatus to provide fitness, health, or other measured or derived, estimated, or predicted metrics are also disclosed.

Disclosed herein is a system for detecting a partial discharge from electrical equipment. The system includes a vest dimensioned for wear by a user. An antenna is associated with the vest, and a receiver is coupled to the antenna and associated with the vest. At least one indicator device is associated with the best. Circuitry is associated with the vest and coupled to the receiver. The circuitry is configured to monitor ambient radiofrequency energy in real time, and determine that the partial discharge has occurred as a function of the ambient radiofrequency energy. The circuitry actuates the at least one indicator device as a function of the determination that the partial discharge has occurred, and transmits the determination that the partial charge has occurred to a control station via the wireless transmitter.

A brim shade has a shade element, a clip, and a hinge that joins the shade element and the clip to make the brim shade. The shade element and the hinge combine to create a shade that does not allow the light to get past the brim shade. The brim shade can be adjusted through 360 degree rotation and along the side of a hat to provide protection to the wearer.

Disclosed herein is a brim set for a knit hat, which can include an adjustable strap in a circular shape configured to be placed inside the knit hat, a brim attachment, and a connector to connect the brim attachment onto the adjustable strap. Also disclosed herein is a knit hat including the brim set, and a method of making a knit hat using the brim set.

A wearable indicator device includes: a flexible sheet having a first surface with an adhesive covering at least a portion of the first surface and a second surface configured to be positioned proximate to skin of a wearer of the wearable indicator device; and a visual temperature indicator. The visual temperature indicator is configured to be visible to bystander(s) when the wearable indicator device is being worn and changes in appearance when exposed to a temperature corresponding to a temperature exceeding a normal body temperature of the wearer to provide a visual indication when the wearer has an abnormal body temperature. The visual temperature indicator is connected to, embedded in, or integral with the flexible sheet, such that the flexible sheet is configured to hold the visual temperature indicator proximate to the skin of the wearer.

Monitoring devices and monitoring technology are disclosed for a number of applications. A monitoring device that attaches to a measurement site includes at least one of an optical sensor, a temperature sensor, or first and second electrical contact sensors. A monitoring device or a smart garment can be powered by one or more bio-batteries that is each formed by electrodes in contact with the user's body (e.g., skin) or an animal. Various method and algorithms can be used to process signals received from the optical sensor, a temperature sensor, and/or first and second electrical contact sensors. The signals received from the optical sensor, a temperature sensor, and/or first and second electrical contact sensors can be transmitted to a host device. An application program on a host device can process the signals to compute one or more physiological parameters, waveform data, trend data, and/or one or more reports.

A brim shade has a shade element, a clip, and a hinge that joins the shade element and the clip to make the brim shade. The shade element and the hinge combine to create a shade that does not allow the light to get past the brim shade. The brim shade can be adjusted through 360 degree rotation and along the side of a hat to provide protection to the wearer.

A protection device is disclosed, where the protection device comprises an eye protection shield, a light beacon, and a control circuitry to control the light beacon.

A protection device is disclosed, where the protection device comprises an eye protection shield, a light beacon, and a control circuitry to control the light beacon.

A head-mounted device capable of more highly accurately measuring the physical conditions of a wearer as a worker that are necessary for estimating the possibility of heat stroke is provided. A head-mounted device includes an outer shell; a first channel as a gap between a head of a wearer and the outer shell; a second channel provided in the outer shell and connected to the first channel; a fan configured to send air from one of the first channel and the second channel to the other; a salinity sensor configured to measure salt concentration of sweat of the wearer; a first humidity sensor configured to measure an absolute humidity of intake air entering one of the first channel and the second channel; and a second humidity sensor configured to measure an absolute humidity of exhaust air exiting from the other of the first channel and the second channel.