. "Yodeling (also yodelling or jodeling) is a form of singing which involves repeated and rapid changes of pitch between the low-pitch chest register (or \"chest voice\") and the high-pitch head register or falsetto. The English word yodel is derived from the German (and originally Austro-Bavarian) word jodeln, meaning \"to utter the syllable jo\" (pronounced \"yo\" in English)."@en . .