This 2nd-gen Nest Hub has “Sleep Sensing” powered by the Soli technology that first debuted on the
Pixel 4 and was later used on the new Nest Thermostat for screen wake.
Google set out to make sleep tracking, which is opt-in, more effortless and help people make nightly improvements.
Sensors analyze your sleep based on movement and breathing, while also identifying disturbances (coughing, snoring, light fluctuations, and temperature changes) that make an impact. Soli is an ideal technology for this purpose because it precisely tracks movement at both macro (limbs flailing) and micro (chest moving up/down as you breathe) levels.
Soli is not a camera that can “see” or identify you, with the Nest Hub only generating movement graphs that — along with audio data — are processed locally and do not leave your device. Only high-level sleep occurrences/events, such as number of coughs and snore minutes, are sent to Google, and a night’s results can be easily deleted in the morning. Meanwhile, you can disable cough and snore detection but retain sleep tracking.
9to5google.com
