Ultrasonic Tone Generator

Simulate the inaudible frequencies (18kHz - 20kHz) embedded in television commercials by data brokers.

Frequency: Hz

200 Hz (Audible) 10,000 Hz 18,000+ Hz (Beacon Range) 22,000 Hz

Note: You likely cannot hear this tone, but your smartphone microphone can easily pick it up. This is how cross-device pairing works.

JavaScript Required: The Web Audio API is required to generate these frequencies in real-time. Without JS, understand that tracking companies embed tones around 19,000 Hz into TV audio. If you have pets (like dogs or cats), they can hear these tracking beacons clearly, even if you cannot.