1 Examples of viral infections include, mumps or hepatitis B. 2  Some autoimmune conditions-such as lupus, or Sjogren's syndrome. 3  Injury to the pancreas. 4  Idiopathic-about 15% of all cases of acute pancreatitis are termed idiopathic pancreatitis.
Large, heavy drums produce low-pitched sounds that often are used to drive the rhythm of different songs. The timpani and pitched bass drums found in marching bands and orchestras are among the most common types of oversize drum. The taiko -- literally meaning âbig fat drumâ -- is a large double-headed oversize drum used in traditional Japanese music.
Percussion instruments are classified as tuned or untuned. Tuned instruments play specific pitches or notes, just like the woodwind, brass and string instruments. Untuned instruments produce a sound with an indefinite pitch, like the sound of a hand knocking on a door.nare drum. The snare drum has a crisp untuned sound that is used by the military and in marching bands. Sometimes called the side drum, the snare drum has two heads made of skin stretched over a hollow metal frame. The top head is struck with wooden drumsticks, and is called the batter-head.