How uXDT Ultrasonic Beacons Work
Speakers of a TV or audio system reproduce sound that is inaudible to the human ear at frequencies from 18 to 22 kHz. Background advertising SDKs built into games or utilities installed on the smartphone continuously analyze the audio stream, recognize the encoded campaign ID, and send a confirmation to the ad server.
Methods of Protection Against Acoustic Device Matching
- Revoke microphone access permission for apps that do not require sound recording for their core functionality
- Disable continuous background operation for installed mobile programs
- Use operating systems with a visible on-screen indicator for active microphone usage
- Mute media device speakers when voice accompaniment is unnecessary