Experimental Analysis of Elastic Dampers Effect on Reflected Waves from Plate Edges in Sound Localization

In this study elastic dampers are implemented to a plate edges to find the damper influence on reflected waves. Most of the published papers in the sound localization on plates were not considered the effect of reflected waves on the final localization. As an experimental example, the sound caused by ping pong ball impact on a Plexiglas plate is used. The effect of the elastic dampers on reflected waves are experimentally analyzed. For this purpose, a database is gathered using recorded signals by low sampling rate electret and pickup microphones. These sound’s signals were recorded for different dampers position on the plate edges. In the proposed method, first the data related to the propagated waves are detected and isolated from the whole signals which are sent by the microphone. Then the effect of elastic dampers on reflected waves are analyzed by a space feature extracted from the energy of recorded signals. Furthermore, in order to evaluate experiment results, statistical analysis are used. The results show reflected waves from edges are clearly influenced by all elastic dampers in different efficiency.