3 ms·
Except when it is real: https://www.wired.com/2016/11/block-ultrasonic-signals-didnt-know-tracking/ https://www.wired.com/2016/11/block-ultrasonic-signals-didn
by thebouv 8y ago
Except when it is real:
https://www.wired.com/2016/11/block-ultrasonic-signals-didnt-know-tracking/ https://www.wired.com/2016/11/block-ultrasonic-signals-didnt...
https://thehackernews.com/2017/05/ultrasonic-tracking-signals-apps.html https://thehackernews.com/2017/05/ultrasonic-tracking-signal...
https://www.wired.com/2017/05/hundreds-apps-can-listen-beacons-cant-hear/ https://www.wired.com/2017/05/hundreds-apps-can-listen-beaco...
- lozf 8y agoThis kind of Ultrasonic tracking i.e listening for a set of specific frequencies that are too high for most humans to perceive is much less complex then actual speech recognition, and consequently much more pragmatic.