Stringed instruments are musical devices that produce sound through vibrating strings. These instruments can be played by plucking, bowing, or striking the strings. Common examples include the guitar, violin, and cello. The pitch of the sound is determined by the string's length, tension, and thickness. There are two main categories of stringed instruments: bowed instruments, like the violin and double bass, which use a bow to create sound, and plucked instruments, such as the harp and banjo, which are played by plucking the strings with fingers or a plectrum.