| CPC A61B 5/256 (2021.01) [A61B 5/291 (2021.01); A61B 5/31 (2021.01)] | 17 Claims |
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1. An apparatus, comprising:
a head-worn device having an interior surface; and
a dual electrode assembly mounted upon the interior surface of the head-worn device, the dual electrode assembly comprising:
a non-contact electrode configured to capacitively couple with a body surface that uses hair as a dielectric when positioned on a user's head,
a dry electrode having multiple contact pins mounted on a first surface of a plate,
an amplifier circuit having an input electrically coupled to the non-contact electrode, the dry electrode, and
a curved substrate,
wherein the non-contact electrode is mounted on a concave surface of the curved substrate and a first portion of the non-contact electrode is distalto the amplifier and a second portion of the non-contact electrode is proximal to the amplifier and is mounted on a convex surface of the curved substrate, wherein the concave surface of the curved substrate has a central angle of 35 degrees and an arc length of 40 mm, and wherein the first portion of the non-contact electrode has a width of 17 mm,
and a housing comprising a surface having multiple ports configured to enclose the dry electrode when the dry electrode is in a first position, and to expose the multiple contact pins outside the housing, wherein the multiple contact pins extend through the multiple ports when the dry electrode is in a second position.
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