A formal sub-classification of idiophones that are comprised of a object that is caused to vibrate by striking it with a non- vibrating object (i.e. mallet, hammer, stick, etc.) to produces sound. These instruments may or may not have discernible pitch and can often contain multiple tuned vibrating objects to allow the instrument to play melody and chords. Percussion Idiophones instruments include:marimbabell lyrecelesteglockenspielorchestra bellsvibraphonegongtrianglexylophonemetallophonechimescelestesteel drumsbellscelestetemple blockswood block See also idiophone; percussion instruments.Also concussion idiophone; friction idiophone; percussion idiophone; plucked idiophone; scraped idiophone; shaken idiophone; rattle idiophone; stamped idiophone; stamping idiophone.