Impact sound analysis by answer-in-weights neural network for damping ratio estimation

The method has been studied for evaluating the damping ratio of composite material by impact sound. So far, the method was examined for obtaining the damping ratio from the change of the vibration. However, it was difficult to estimate accurately by this method, because of the attenuation tendency might be uncertain. In this paper, we propose to use a neural network for impact sound analysis. We examined this neural network method through the computer simulation using the data of actual impact sound. As the result, we confirmed the effectiveness of using the neural network for estimating the damping ratio.