When a liquid drop falling through the air strikes a flat horizontal surface, there are acoustic emissions associated with this impact in both the air and the liquid [G. J. Franz, J. Acoust. Soc. Am. 31, 1080 (1959)]. Under certain conditions, a small air bubble can be entrained in the liquid by the impacting drop and stimulated into volume pulsations that radiate quite strongly. When several drops impact the surface in a short time interval as in rainfall, the acoustic emissions associated with the bubble oscillations appear to be a major contribution to the total acoustic emission over a considerable bandwidth. With artificially created rainfall, the spectral peak observed near 20 kHz for natural rainfall can be duplicated [Scrimger et al., J. Acoust. Soc. Am. 81, 79 (1987)]. However, with the addition of surface tension reduction agents, this peak is significantly reduced, implying that a major portion of the noise associated with rainfall is related to oscillations of the entrained bubble rather than due to the impact of the drop with the liquid surface. [Work supported by the ONR.]