TRANSIENT WAVE RESPONSE OF A CYMBAL USING DOUBLE-PULSED TV HOLOGRAPHY

Using an electronic system for pulsed TV holography with a double-puls ed ruby laser, transient wave propagation during intervals from 30 to 480 mu s after impact is recorded. The first observable bending waves, having wavelengths of about 5 mm, propagate at about 1700 m/s, and re ach the edge of the cymbal in about 60 mu s. These are quickly followe d by waves of longer wavelength which scatter at the outer edge of the cymbal and also the central dome and result in standing waves. A phas e unwrapping procedure is used to obtain a three-dimensional map of th e wave field. Holographic film recordings similarly show scattering of transient bending waves at the central dome. (C) 1998 Acoustical Soci ety of America. [S0001-4966(98)01802-5].