Abstract: A method (100) for estimating sympathetic arousal of a subject, the method (100) comprising the steps of: obtaining physiological data (500) from the subject (102), the physiological data (500) including at least one of galvanic skin response data, skin blood perfusion data, and heart rate data of the subject; processing the physiological data (500) to determine one or more features of the physiological data (500); providing the one or more features of the physiological data (500) to a correlation engine (300), the correlation engine (300) configured to correlate the one or more features of the physiological data (500) with a database (400) representing sympathetic nervous activity signals to estimate a sympathetic nervous activity level of the subject; and generating an output of the estimated sympathetic nervous activity level of the subject.

Abstract: Disclosed herein are methods and devices for monitoring a heartbeat. In one embodiment, the device may comprise a sensor package mountable over a pulse location of a user. The sensor package may include a first sensor element configured to sense at least one signal at the pulse location and to provide a first output signal comprising a heart pulse signal and a first set of noise artifacts, a second sensor element configured to sense at least one signal at the pulse location and to provide a second output signal indicative of a second set of noise artifacts, and a mechanically isolating material located between the first sensor element and the second sensor element. The device may further comprise processing circuitry connected to the sensor package and configured to extract the heart pulse signal from the first output signal based on the first output signal and the second output signal.

Abstract: Disclosed herein are methods and devices for monitoring a heartbeat. In one embodiment, the device may comprise a sensor package mountable over a pulse location of a user. The sensor package may include a first sensor element configured to sense at least one signal at the pulse location and to provide a first output signal comprising a heart pulse signal and a first set of noise artefacts, a second sensor element configured to sense at least one signal at the pulse location and to provide a second output signal indicative of a second set of noise artefacts, and a mechanically isolating material located between the first sensor element and the second sensor element. The device may further comprise processing circuitry connected to the sensor package and configured to extract the heart pulse signal from the first output signal based on the first output signal and the second output signal.