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When the soundwaves hit the person and bounce back, they’re picked up by the sophisticated microphone array built into voice-controlled gadgets like the Amazon Echo or Google Nest. Once they’ve been picked up, complex algorithms developed by the scientists analyse the data and work out the heart-rate of the person in the room. The new technique was discovered by researchers at the University of Washington, who trialled the system on healthy people as well as cardiac patients in the hospital. In the tests, the scientists said the smart speaker was able to detect heartbeats almost as accurately as a medical-grade electrocardiogram (ECG) monitor. And unlike the latter, there’s no need to touch the patient.

University of washingtonUnited statesMark stoneShyam gollakotaAmazon echoPrivacy noticeGoogle nestAlexa guardSamsung galaxy watchPersonal technologyAutoplay videoAmazon echo heartbeatAmazon echo heart trackingAmazon echo track heartbeatAmazon echo update new featuresAmazon echo vs google home