Acoustic coin identification and sorting method in which a coin is struck with a hard object and the resulting sound waves generated by the resonant vibration of the coin compared with stored reference values

摘要

Method for acoustic identification of coins in which a coin is struck with a hard impact surface to generate resonant vibration in the coin. The sound waves generated by the resonant vibration are measured and the coin resonant frequency compared with reference values from a pattern coin in order to identify the coin.