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The sound of silver?


Oroargento

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Hi all,

 

A strange question i'm sure, but one I have often pondered. There may also be a very simple answer!

 

3 coins, a silver maple, a silver eagle and a philharmonic all have very different 'rings' when tapped with something metallic. I'm aware of the silver ring test but I struggle to understand how metal of the same kind and usually the same fineness 999 can have such different sounds. Silver eagles tend to be higher pitched and the ring lasts much longer than the maple for example. Why is this? They usually contain the same composition alloy i.e. copper but each coin tends to have it's own unique sound. They all usually weigh 31.1g so is it simply the slight changes in diameter or width that result in the changes?

 

 

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The resonance frequency depends basically on density, thickness and diameter. In fact, there exists a cool app that detects fake vs real silver coins by "listening" its ding, it has recorded several acoustic profiles for each type of coin (maple, eagle, ...).

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The resonance frequency depends basically on density, thickness and diameter. In fact, there exists a cool app that detects fake vs real silver coins by "listening" its ding, it has recorded several acoustic profiles for each type of coin (maple, eagle, ...).

I have that app. I bought to see how it works and thought I can write a better one. But I need more time than I have.

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