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 Bridgebridge]] is a term more used on [[electric guitar]]s or [[prepared guitar]]s, but is the same technique. By playing the instrument at a string part behind the bridge, the opposed part starts to resonate. The tone is louder at harmonic relations of the bridge string length. On violins the tone can be very high, even above our hearing capacity. 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 in a [[violin]] [[cadenza]] represents a donkey’s braying.
