A miniature electrode for surface electromyography during speech

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Abstract
A miniature recessed (i.e., cup) surface EMG [electromyogram] electrode intended for use in the perioral region during speech was constructed and tested. In addition to its small size and low mass, a custom acrylic electrode housing features an extruded design to yield secure attachment to the skin with skin cement rather than with conventional double adhesive collars. A durable, commercially manufactured disc of homogeneous Ag and sliver chloride was utilized to optimize bioelectric characteristics and durability. In relation to the commonly used fine-wire intramuscular electrode composed of Pt-Ir this surface electrode demonstrates comparable bioelectric performance in perioral application including low, stable, and well-matched skin-electrode impedance, a low noise floor, a surprisingly wide bandwidth, and good signal to noise ratios.

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