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The method is called Audioplethysmography (say that three times fast), or APG for short.
The echoes are influenced by tiny ear canal skin displacement and heartbeat vibrations.
Google Pixel Buds Pro
They could tell if the heart was beating fast or slow.
Apparently, the devices could accomplish their task even with music playing and outside sound leaking in.
Whats more, the technology isnt impacted by different skin tones or different ear canal sizes.
It all works the same.
Plus, the company claims it was able to make ANC headphones support APG with a simple software upgrade.
So whats the hold-up?
Well, its still a work in progress.
Also, the team behind the APG hopes the findings can be used in other experiments.
Google explains ANC headphones utilize feedback and feedforward microphones to function.
Until we learn more, be sure to check out TechRadars list of thebest fitness trackers for 2023.
