Abstract
Cymbals, tamtams, and gongs are three important examples of percussion musical instruments which employ vibrating plates. When struck, they vibrate in many different modes of vibration and radiate sound which is rich in overtones [T. D. Rossing, The Physics Teacher 15, 278 (1977)]. Gongs convey a fairly strong sense of pitch, whereas cymbals have indefinite pitch. We have studied the modes of vibration and the sound spectra of a number of cymbals, gongs, and tamtams both when struck and when driven in steady state. Various techniques have been employed for studying the modes of vibration, including Chladni patterns, holographic interferometry, probing the nearfield sound, and attaching vibration sensors [T. D. Rossing and R. Ross. J. Acoust. Soc. Am. Suppl. 1 64, S150(A) (1978)]. In some cases the results agree closely with the simple theory of plate vibrations; in other cases, rather unusual effects are observed.
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