- Andrew C. McGraw
Concussion idiophone of Siberut, Mentawai, Indonesia. It is a pair of wooden or metal bars measuring about 20 cm by 3 cm. One is held in the player’s left hand and struck by the other, held perpendicularly to it in the right hand. Alternately, sinna denotes a hoe-blade struck with an iron bar. It is used in an ensemble with ...