Key points from article :
Google researchers use ultrasound technology to measure heart rate with off-the-shelf headphones.
This new approach is more resilient to bad ear seal, differing ear canal size, and darker skin tones.
The researchers found that the ultrasound approach works fine when music is playing, but not in noisy environments.
They were able to overcome the motion problem by using multiple frequencies and teasing out the most accurate signal.
In a field study with 153 participants, the median error rate for heart rate and heart rate variability was 3.21% and 2.70%, respectively.
This new technology could lead to more accurate and affordable heart rate monitoring devices in the future.
While this study doesn't imply immediate product releases, it offers intriguing insights into Google's venture into wearables, showcasing their innovative approach.
Explore the full research on Google's website.
