Yodeling (or yodelling, jodeling)'s a form of singing that involves singing an extended note which rapidly and repeatedly changes in pitch from the vocal or chest register (or "chest voice") to the falsetto/head register; making a high-low-high-low sound. This vocal technique's used in many cultures throughout the world. History In Alpine folk music, it was probably developed in the Swiss Alps as a method of communication between mountain peaks, later becoming part of the region's traditional m… (More on Yodel)