The music of gold: can gold counterfeited coins be detected by ear?
Arnaud Manas · European Journal of Physics · 2015
In this paper I investigate whether it is true and to what extent counterfeit coins can be detected by their sound frequency. I describe the different types of counterfeit coins encountered and their respective characteristics. I then use the Kirchoff thin plate theory to model a coin, and confirm the validity of the theory by listening to the tone of genuine and counterfeit coins.