This work investigates the propagation of acoustic pulses through a chain of elastic spheres embedded in air. This study is an extension of the works realized on individual sphere by several authors for measuring elastic constant and internal friction with a monofrequential acoustic excitation. The frequency analysis of the experimental transmitted train waves exhibit maxima which were correlated to different types of free vibration modes: the Rayleigh modes the torsional modes and the spheroidal modes These resonances may be generated separately according to the polarization of the excitation pulse.
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