Metallophone Metallophone A metallophone is any musical instrument consisting of tuned metal bars which are struck to make sound, usually with a mallet. Metallophones have been used in music in Asia for thousands of years. There are several different types used in Balinese and Javanese gamelan ensembles, including the gendér, gangsa and saron. These instruments have a single row of bars, tuned to the distinctive pelog or slendro scales, or a subset of them. The Western glockenspiel and vibraphone are also metallophones: they have two rows of bars, in an imitation of the piano keyboard, and are tuned to the chromatic
Post Instrument or three operators, one operating the Post Instrument, another using the telephone to report the locations to a plotting center, and the third, if present, operating as a lookout and helper. The original Post Instrument was supported by a metal rod extending vertically from the center of a circular table. A small section of map showing the surrounding area was attached to the tabletop. The instrument itself consisted of an open rectangle of metal bars, with the long axis horizontal. Hinges at the connection points between the bars allowed the bars to be rotated to form various parallelograms. Similar hinges