How to Make Water Music - Slap, Plunge, Plow! —

Female musicians from the northern islands of Vanuatu use the water surface as an instrument to create a variety of unique sounds - slap, plunge, plow - which they accompany with singing. Each interaction with the water surface produces a different acoustic response corresponding to the air-water-hand interaction, each of which has been studied by Randy Hurd and Tadd Truscott of Utah State University.

https://www.youtube.com/watch?v=zaKdsniQyIY