“Hey Alexa, Are My Heart Rhythms Normal?”

Scientists train smart speakers to pick up the faint sounds of heartbeats.

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Smart speakers-devices such as Amazon’s Echo and the Google Home-lend a helping hand around the house, telling us the weather, turning on lights, and giving us the latest news headlines. Now, scientists say they could also keep track of our heart rhythms, alerting us to the presence of possibly life-threatening…