A form of singing or calling marked by rapid alternation between the normal voice and falsetto that originated in Austro-Bavarian culture. Yodelling can be heard in some works by Richard Strauss. Found on https://www.eno.org/discover-opera/opera-glossary/
1) Singing alpine-style 
A form of singing or calling marked by rapid alternation between the normal voice and falsetto that originated in Austro-Bavarian culture. Yodelling can be heard in some works by Richard Strauss.