Alexa and Siri Can Hear This Hidden Command. You Can’t. Researchers can now send secret audio instructions undetectable to the human ear to Apple’s Siri, Amazon’s Alexa and Google’s Assistant. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Lions Eat Men Suspected of Poaching Rhinos. Some Saw ‘Karma.’Proof of Children’s Vaccinations? Italy Will Now Take Parents’ Word for ItIt’s Hot Out. Here Are Some Tips to Stay Cool.The Science (and the Scientists) Behind Ant-ManHow Andrew Wheeler, the New Acting E.P.A. Chief, Differs From Scott PruittFeature: Who’s Afraid of the Big Bad Wolf Scientist?