A member of the zither family, the Appalachian dulcimer, or mountain dulcimer as it's commonly known, is a US folk instrument that originated in Europe. Different to the hammered dulcimer, the mountain dulcimer is a narrow zither with three to five metal strings running over a fretted fingerboard.
Unlike other string instruments the fingerboard is set centrally along the entire length of the dulcimer. The traditional way to play the instrument is to lay it flat on the lap and pluck or strum the strings with the right hand, while fretting with the left.
Dulcimer players use a small stick or dowel, called a 'noter' to pluck or strum the strings.
Another significant difference between the mountain dulcimer and other folk string instruments lies in the layout of the finger board. Appalachian or mountain dulcimers are typically arranged in a diatonic scale whereas instruments like the banjo, mandolin or bouzouki are fretted chromatically.