Drizzle Recording
  Drizzle is surprisingly lound underwater because the small raindrops generate bubbles as they hit the water. These similar-sized bubbles oscillate when they're young, producing a high frequency bell-like tone. (Image by Robert Simmon, NASA GSFC. Recording from Jeffrey A. Nystuen, University of Washington Applied Physics Laboratory)

small drop animation

large drop recording
hard rain recording
drizzle recording