Coin Ping Tester

How to Test

1. 1Select the coin type you want to test from the dropdown.
2. 2Click “Start Listening” and allow microphone access. For best results, disable echo cancellation in your browser audio settings.
3. 3Balance the coin on the tip of your index finger (or a soft surface that won't dampen vibrations).
4. 4Strike the edge of the coin firmly with your fingernail or a pencil. The coin should ring clearly.
5. 5Hold the coin 10–20 cm from your microphone. The spectrogram updates in real time.
6. 6The result auto-captures when the ring decays. You can also click “Capture Reading” manually.