photoplethysmography

The technique is known as Photoplethysmography (PPG).

It is Israeli technology and they do excel at things like photoplethysmography (PPG) and coulometry, from a historical standpoint.

By the way, the term for this kind of biomedical measurement modality is Photoplethysmography (PPG).

I came here ready to pontificate on the wild world of signal processing for electrocardiography and photoplethysmography sensors.

You do not need an ECG sensor for this, and the photoplethysmography (PPG) sensor works great on the Garmin watches, for doing this.

Smartwatches and similar devices use photoplethysmography (PPG) to measure blood oxygen saturation.

The in-ear sensor uses photoplethysmography (PPG) in combination with machine learning to estimate blood glucose levels without the need for painful fingersticks or invasive devices.

AirPods Pro 3 introduce a custom photoplethysmography (PPG) sensor that shines invisible infrared light pulsed at 256 times per second to measure light absorption in blood flow.

> The Hilo Band uses photoplethysmography (PPG)—an optical sensor technology that collects data from your wrist.

Via an optical sensor that can perform photoplethysmography.

This is really interesting in that it doesn't use photoplethysmography (PPG) in the same way that the Galaxy Active 2 does(an optical sensor that measures bounced back light.) There's an inflatable cuff within the wristband.

The whole field of remote photoplethysmography (rPPG) is quite interesting.

For those interested in the pulse rate extraction, there is actually a branch of biomedical engineering/computer science called "remote photoplethysmography" (rPPG).

I got halfway down where they start to talk about the sensors but then goes off into "The multiple sensors inside the ring form an 18-path multi-wavelength photoplethysmography (PPG) subsystem to provide highly accurate, continuous data throughout the day and night." What does this thing do and how does that improve my health/life?

Photoplethysmography just means, roughly, light based volume measurement.