Sunday December 04, 2022

Light sensors on wearables struggle with dark skin and obesity

Photo by Amelia Holowaty Krales / The Verge

According to a new study, light sensors that are used to monitor heart rate in wearable devices such as the Apple Watch Series 5 or the Fitbit Versa 2, don’t work well on people with darker skin tones or obese people.
This is a problem for current features in devices, but it’s also a problem for efforts to use light sensor for new applications, such as monitoring blood pressure. Jessica Ramella Roman, an associate professor at Florida International University, said that this is a problem for existing features.
She says, “The architecture of the device must change.”
The study examined the photoplethysmography signal (PPG), a technique that uses changes of how light is reflected to measure bloodflow, on three wearable devices.

Continue reading…

Back to Top
%d bloggers like this: