The ulla ( Korean: 운라; Hanja: 雲鑼; 雲羅) is a traditional Korean percussion instrument comprising a set of ten small tuned gongs in a wooden frame. They are struck with a mallet. [1] [2] Each of the gongs are the same size, but they produce different sounds due to their differing thickness. [2]
It is also called guunra (구운라; 九雲鑼) or uno (운오; 雲璈). [2] The instrument is attested to during the Joseon period. [2]
The ulla is derived from the Chinese yunluo.