It is classified as an idiophone (a percussion instrument). The caxixi is an indirectly struck idiophone. A common plucked idiophone is the Jew's harp. The Hang can also be used as a friction idiophone. The xylophone is a tuned idiophone, common throughout west and central Africa. The pogo cello is a percussion instrument in the idiophone family. A bell is a directly struck idiophone percussion instrument. The balafon is a gourd-resonated xylophone, a type of struck idiophone. It is an idiophone which often accompanied choral singing. The celesta or celeste is a struck idiophone operated by a keyboard. The vibraphone is a musical instrument in the struck idiophone subfamily of the percussion family. Another idiophone, a soundingboard, sometimes accompanied the solo recitation of poetry. Musicologists classify it as a lamellaphone, part of the plucked idiophone family of musical instruments. The instrument is categorized as a friction idiophone, as it is played by bowing. The guitar is used the way that an African drum, or idiophone would be used.