Analysis of near field sound pressure and structural vibration of a snare drum by experimental modal analysis

Abstract

In recent years, software-based music composition is becoming common among composers. In this study, we imitate the sound radiation about striking force using vibration transmission and acoustic characteristics of the structure of snare drums. The aim of the study is to propose a methodology that enables one to virtually reproduce the radiated sound accurately. In this report, results of experimental modal analysis by impulse excitation of membrane of snare drums are presented. We conducted the analysis with radiation sound pressure from battered membrane. The sound pressure was measured with a microphone which is located near the battered membrane. Then we compared the obtained modal characteristics with those predicted by theoretical analyses. By using mode assurance criterion, we identified that experimentally-obtained low-order modes have a correlation with the theoretically predicted modes. In addition, spatial orders of experimentally-obtained high-order modes illustrate that they match well with those of theoretically obtained modes. In conclusion, we identified experimental acoustic modes that agree with theoretical vibration modes.