Dave Farrington is at it again, pointing out exactly what takes place to track users without their knowledge. Now it’s inaudible sound waves.
Millions of app downloads have occurred on Android, and major companies– McDonald’s for one– are involved. What happens is a bit scary. Ultrasonic audio is pumped out at 18 to 20kHz– just above the ability for humans to hear– but picked up by applications that use the smartphone’s built-in microphone.
Ipso facto and alakazam. Users are tracked to the point of stalking and they don’t even know it.