A string buzz is produced by plucking a string with so much force that it clashes against the next string creating a buzzing sound.
When the two strings clash together a short buzzing sound is heard
A string buzz is notated by adding the noise symbol below the note.
A string buzz can only be produced effectively in the lowest octave of the harp. In the remaining octaves the string will not hit the adjacent string despite being plucked forcefully.