Yodeling is a form of singing that involves extending the voice to produce a unique sound by rapidly alternating between chest voice and head voice. It originated in the Alpine regions of Europe, where it was used as a means of communication across valleys or over long distances. Yodelers typically use their voices to imitate the sounds of nature such as birds or animals, often incorporating high-pitched melodies with rapid changes in pitch and volume. The word "yodel" comes from the German word "Jodeln," which means "to cry out."