Patent ID: 11857341
Assignee: APPLE INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. A wearable device, comprising:
a housing;
a wrist band;
a plurality of measurement electrodes on a surface of the housing or the wrist band and positioned to contact a portion of the user's skin during a measurement, wherein each measurement electrode of the plurality of measurement electrodes is independently measurable to generate a measurement signal of the portion of the user's skin; and
a controller, wherein the controller:
selects a sampling rate or frequency for each of measurement electrode of the plurality of measurement electrodes, using a respective noise signal determined for each measurement electrode of the plurality of electrodes;
samples each measurement electrode at the sampling rate or frequency to obtain the measurement signals; and
determines one or more physiological parameters from the measurement signals obtained from the first group of measurement electrodes.