● Ping — Coin Ring Tester
Acoustic ping test for silver & gold bullion, in your browser. No data leaves your device.
Play reference tone
— plays the expected ring so you can hear it (and sanity-check the analyzer).
How to test: balance the coin flat on a fingertip (touching as little as possible),
then tap its edge with a fingernail or another coin, close to the microphone.
Repeat a few taps — readings should cluster inside the green band.
Your browser kept voice processing (echo cancellation / noise suppression) enabled on the
microphone — common on iPhone/Safari. Frequency readings usually still work, but ring
volume and sustain may be distorted.