This fairly common extended technique involves bowing the instrument on the short length of string behind the bridge. The tone is very high and squeaky. [[3rd bridge]] is a term more used on [[electric guitar]]s or [[prepared guitar]]s, but is the same technique. By playingPlaying the instrument at a string part behind the bridge, causes the opposed part startsof the string to resonate. The tone is louder at harmonic relations of the bridge string length. On violins the tone can be very high, even above ourhuman hearing capacityrange. Depending on the instrument the pitch of the tones may or may not be perceived ([[cello]]s and [[double bass]]es are more likely to produce recognizable pitches because of the longer length of their strings). This technique is used extensively in [[Krzysztof Penderecki|Krzysztof Penderecki’s]] ''[[Threnody to the Victims of Hiroshima]]''. Another interesting example is found in [[Ferde Grofé|Ferde Grofé’s]] [[Grand Canyon Suite]] where bowing behind the bridge inon a [[violin]] [[cadenza]] representsis used in the representation of a donkey’s braying.
