Grumpy Old Geeks Topics Hidden voice commands Topic Hidden voice commands 2 mentions in 1 episode Commands embedded in audio that the speakers say voice assistants can detect when listeners cannot. Mentions 259: All Your Blockchain Are Belong To Us May 14, 2018 1:06:21 commands that are inaudible to the human ear, but can be picked up by Siri and Alexa 1:07:39 burying the sound within the music that it's playing