Скачать или смотреть Feeling nerdy? Hole drilled. More questions. Ping Test, Tests to be continued.

Feeling nerdy? Hole drilled. More questions. To be continued.

In short: after the hole was drilled the central vibration frequency shifted left and out of the target shaded area on the chart. Result is 4/5 Peaks matched instead of the undrilled 5/5.

Pretty cool.
More to do/learn here.

Big inspirational thanks to Dr. David Rakestraw, the late Phil Paul, Ben Faber from Faber Acoustical, and A W Leissa for his extensive work and study on vibrating plates.

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If you or someone you know would like to test metals with a Pocket Pinger, they’re available at CoinPingTest.com, Amazon, and eBay.

Disclaimer: All the risks associated with pinching a coin in between your fingers and then tapping it with plastic and/or wood are present when using the device. The ping test is used for alloy identification. Always compare the sound of a potential counterfeit with the sound of a known authentic or trusted data base. Any difference in sound is a strong indication that further testing is needed. Always use multiple testing methods.

The Pocket Pinger has helped catch over 100 fake coins, all confirmed.

If you catch one with yours please reach out. There’s a valuable lesson to share in each story.

Dozens of Pocket Pinger demo videos can be found on the profile.

A simple ping test really can prevent a counterfeit situation.

If someone might like or benefit from this content please share it with them.

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Test your stack.

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