Discussions on Vibration Characteristics and Percussion Sound of Finger Cymbals

• Main Authors: Wen-Li Kuo, 郭紋利
• Other Authors: Bor-Tusen Wang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/03282362291490318186

碩士 === 國立屏東科技大學 === 機械工程系所 === 101 === A pair of finger cymbals is played by hanging them horizontally and gently striking the outer edge of cymbals together. The percussion sound reveals sharp and clear. This work aims to study the vibration and sound characteristics of finger cymbal. First, the sound measurement program is used to measure the percussion sound of small cymbals. Single cymbal is struck by different stick heads to produce the percussion sound that is measured to record the time domain response and analyzed by fast Fourier transform (FFT) to obtain the frequency spectrum. The peak amplitudes of frequency contents can be identified for the fundamental frequency and overtone. The impact sound between two cymbals is also studied. The finite element (FE) model for the finger cymbal is then constructed to perform modal analysis so as to obtain natural frequencies and their corresponding mode shapes. Base on the measured resonant frequencies from the sound measurement, the FE model can be updated to be equivalent to the real structure for model verification. The vibration characteristics can be identified from finite element analysis (FEA) and shown the relation between the percussion sound and vibration modes. This work shows the application of model verification by FEA and sound measurement to identify the vibration characteristics of finger cymbal and correlate to its percussion sound .The analgfical approach can be applied to other musical instrument as well.