The String Family, also known as the string instruments, includes instruments that produce sound through vibrating strings. Common members of this family are the violin, viola, cello, and double bass. These instruments can be played by bowing the strings or plucking them, and they are essential in various music genres, including classical, folk, and jazz. String instruments are typically made of wood and have a hollow body that amplifies the sound. They are tuned in perfect fifths, allowing for a rich harmonic range. The piano is sometimes included in discussions about string instruments, as it has strings inside that are struck by hammers.