String instrument rosin than players of lower-pitched instruments, who tend to favor darker, softer rosin. The ravanahatha is one of the oldest string instruments. Ancestors of the modern bowed string instruments are the rebab of the Islamic Empires, the Persian kamanche and the Byzantine lira. Other bowed instruments are the rebec, hardingfele, nyckelharpa, kokyū, erhu, igil, sarangi and K'ni. The hurdy-gurdy is bowed by a wheel. Rarely, the guitar has been played with a bow (rather than plucked) for unique effects. The third common method of sound production in stringed instruments is to strike the string. The piano and hammered dulcimer use
Hurdy-gurdy end. It was around this time that "buzzing bridges" first appeared in illustrations. The buzzing bridge (commonly called the "dog") is an asymmetrical bridge that rests under a drone string on the sound board. When the wheel is accelerated, one foot of the bridge lifts from the soundboard and vibrates, creating a buzzing sound. The buzzing bridge is thought to have been borrowed from the "tromba marina" (monochord), a bowed string instrument. During the late Renaissance, two characteristic shapes of hurdy-gurdies developed. The first was guitar-shaped and the second had a rounded lute-type body made of staves. The lute-like body