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.