Hollerin'

Spivey's Corner, North Carolina, is famous for hollerin'. Hollerin' is a traditional method of communicating over distances, and before telephones were common, was used by widespread farm residents across the American South. It will remind you of yodeling, which began as a method of communication in the Alps, and indeed, some of the hollerin' incorporates yodels. Spivey's Corner came to national attention when they staged the first Hollerin' Contest in 1969. It grew to become the National Hollerin' Contest. This documentary about hollerin' was made in 1978. 

The National Hollerin' Contest ceased in 2016 due to a lack of people who still did it. Read more about the tradition, and the contest, at Atlas Obscura. (via Boing Boing)