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.
For instance, in America, these kinds of drums are referred to as the doumbek. They are widely used in E. Europe, N. Africa and a larger part of Asia. Good examples of these kinds of drums include the Bendir, Riq, Tamburine, Irish bodhran etc. These drums are mostly made of wood which forms almost a perfect circle.
Chimes, bells, and xylophone are examples of fixed-pitch percussion instruments. These instruments have a definite pitch, but the pitch cannot be tuned or changed by the player. Usually, fixed-pitch percussion instruments are arranged in sets, similar to the layout of a piano keyboard.here are three basic types of percussion instruments. Instruments such as the snare drum and cymbal are of indefinite pitch. The sound they produce has no specific pitch and works with any harmony or key that the band might be playing.