Google’s New APG Technology Can Bring Heart Rate Sensing Capability to ANC Headphones

APG records heart rate data via feedback derived from low intensity ultrasound signals.

Google’s New APG Technology Can Bring Heart Rate Sensing Capability to ANC Headphones

Photo Credit: Dyson

APG can add heart rate monitoring to all ANC headphones via a software upgrade

  • APG can monitor heartrate via headphones during music playback
  • The technology works across different skin tones and eartips sizes
  • APG sends and receives signals via earphone speakers and microphone

Most of us use a smartwatch or a dedicated heart monitor that come with advanced sensors to measure our heart rates. But what if the same capability could be added to a pair of wireless earphones? Scientists at Google have published their research paper on Audioplethysmography (APG), a new cardiac monitoring function for active noise cancellation (ANC) headphones. APG records heart rate data via feedback derived from low intensity ultrasound signals, employing the headphone's speakers and microphone to send and receive the signal, respectively.

The new study was published on Google Research portal, detailing the APG technology and the research process. “APG sends a low intensity ultrasound probing signal using an ANC headphone's speakers and receives the echoes via the on-board feedback microphones,” the research paper explains.

Google researchers observed that heartbeats modulate ultrasound echoes as the volume of ear canals changes slightly with blood vessel deformations. According to them APG delivers an accurate record of cardiac activities using mass-market ANC headphones, while the wearer is playing music and is engaged in body motion like running.

The scientists also conducted an eight-month-long field study with 153 participants to test APG in different conditions, the paper said. The experimental design and results of the technology have also been reviewed by Google's internal Health Team, Product Team, User Experience (UX) Team, and Legal team, with feedback taken from all to bring improvements.

“Our results demonstrate that APG achieves consistently high HR (3.21 percent median error across 153 participants in all scenarios) and HRV (2.70 percent median error in interbeat interval, IBI) measurement accuracy,” the study said. “Our UX study further shows that APG is resilient to variation in: skin tone, sub-optimal seal conditions, and ear canal size,” it added.

According to the research paper, APG can add heart rate monitoring feature to all ANC headphones via a software upgrade with negligible impact on battery life. The feature would even work while playing music through the headphones, engaging in a physical activity, and across different skin tones and eartips sizes.

While there's no word on when the APG technology could be available for wide use, the paper says that future research on the topic would focus on ensuring high performance of APG in rigorous mobile scenarios like hiking, weightlifting, boxing, high-intensity interval training and more.

Are the Pixel 7 and 7 Pro the best in their segment? We discuss this on Orbital, the Gadgets 360 podcast. Orbital is available on Spotify, Gaana, JioSaavn, Google Podcasts, Apple Podcasts, Amazon Music and wherever you get your podcasts.
Affiliate links may be automatically generated - see our ethics statement for details.

For details of the latest launches and news from Samsung, Xiaomi, Realme, OnePlus, Oppo and other companies at the Mobile World Congress in Barcelona, visit our MWC 2024 hub.

Manas Mitul
In his time as a journalist, Manas Mitul has written on a wide spectrum of beats including politics, culture and sports. He enjoys reading, walking around in museums and rewatching films. Talk to Manas about football and tennis, but maybe don’t bring up his video game backlog. More
Vivo Introduces Origin OS 4 for Chinese Phone Models With Android 14, UI Overhaul, Vivo Smart Car 4 Support
Share on Facebook Gadgets360 Twitter Share Tweet Snapchat Share Reddit Comment google-newsGoogle News


Follow Us


© Copyright Red Pixels Ventures Limited 2024. All rights reserved.
Trending Products »
Latest Tech News »