I'm very surprised this is news, especially on HN but even on the BBC. I can't believe serious IT security researchers wouldn't be aware of it.
A well-known (to me, I suppose) application is to listen to commercials playing on TV, in pursuit of the ad industry goal of tracking users between platforms. There's even a tech that ads an inaudible sound to commercials that your phone can pickup.
A well-known (to me, I suppose) application is to listen to commercials playing on TV, in pursuit of the ad industry goal of tracking users between platforms. There's even a tech that ads an inaudible sound to commercials that your phone can pickup.