Small Drop Animation
	How do Raindrops Make Sound Underwater?		Small raindrops (0.8—1.2 mm diameter) are remarkably loud. The impact component of their splash is very quiet, but the geometry of the splash is such that a bubble is generated by every splash in a very predictable manner. These bubbles are relatively uniform in size, and therefore frequency, and are very loud underwater. Small raindrops are present in almost all types of rainfall, including light drizzle, and are therefore responsible for the remarkably loud and unique underwater “sound of drizzle” heard between 13—25 kHz, the resonance frequency for these bubbles. (Animation by Susan Gonnelli, NASA Television) drizzle recording small drop animation medium drop animation large drop animation