Google researchers use noise-canceling headphones to monitor heart health

Image and caption courtesy of Google. APG sends a low intensity ultrasound transmitting wave (TX wave) using an ANC headphone's speakers and collects the receiving wave (RX wave) via the on-board feedback microphones. The APG signal is a pulse-like waveform that synchronizes with heartbeat and reveals rich cardiac information. Audioplethysmography Google headphones.

APG sends a low intensity ultrasound transmitting wave (TX wave) using an ANC headphone's speakers and collects the receiving wave (RX wave) via the on-board feedback microphones. The APG signal is a pulse-like waveform that synchronizes with heartbeat and reveals rich cardiac information. Image and caption courtesy of Google.

The new technique, audioplethysmography, can monitor a user’s heart rate and other physiological signals using headphones equipped with active noice canceling technology. It requires no additional sensors.