Yeah, it's weird. There was already a scare about ultrasonics being used for ad tracking in 2016 [1] so it's not like this is an unknown attack vector, and I th

Yeah, it's weird. There was already a scare about ultrasonics being used for ad tracking in 2016 [1] so it's not like this is an unknown attack vector, and I thought the subsequent patch efforts had already added filters that stopped the phones listening on ultrasonics. I also remember seeing a presentation on the first gen Echo which went into its noise cancelling tech, making sure that stuff coming out of the speaker wasn't received by the mic, so the success of the speaker-to-mic attack vector also seems totally bizarre. 1: https://www.wired.com/2016/11/block-ultrasonic-signals-didnt-know-tracking/ https://www.wired.com/2016/11/block-ultrasonic-signals-didnt...