Mouth harps, also known as jaw harps, juice harps, or Jew's harps, are musical instruments that are played by plucking a metal reed with the mouth while the frame of the harp is held against the player's teeth. In addition to these common synonyms, depending on the region and culture, mouth harps may also be referred to as trump, murchang, guimbarde, or khomus. The unique sound produced by the mouth harp has been used in various types of music for centuries, from traditional folk tunes to contemporary pop and rock. Regardless of the name, playing the mouth harp requires skill and practice to master the technique and produce beautiful music.