Gudok

The gudok or hudok (Russian:гудок, Ukrainian:гудок) is an ancient Eastern Slavic string musical instrument, played with a bow.

A gudok usually had three strings, two of them tuned in unison and played as a drone, the third tuned a fifth higher. All three strings were in the same plane at the bridge, so that a bow could make them all sound simultaneously. Sometimes the gudok also had several sympathetic strings (up to eight) under the sounding board. These made the gudok's sound warm and rich.