Patent 11559255 was granted and assigned to Orbital Research Inc. on January, 2023 by the United States Patent and Trademark Office.
Earphone 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.