String resonance (music)

String resonance (music)

String resonance occurs on string instruments. Strings or parts of strings may resonate at their fundamental or overtone frequencies when other strings are sounded. For example, an A string at 440 Hz will cause an E string at 330 Hz to resonate, because they share an overtone of 1320 Hz (3rd overtone of A and 4th overtone of E).

Electric guitars can have string trees near the tuning pegs to mute this type of reverberation. The string length behind the bridge also must be as short as possible to prevent the resonance.String resonance is a factor in the timbre of a string instrument. Tailed bridge guitars like the Fender Jaguar differ in timbre from guitars with short bridges, because of their (extended) floating bridge. The Japanese Koto is also a good example of an instrument with occurring string resonance.

tring resonance in instrument building

Sometimes string resonance is used in the construction of the instrument, like for instance the Sympathetic strings in many Eastern instruments.

Piano

According to a 2007 Grove Music Online article on "duplex scaling", Steinway developed a system of Aliquot stringing to provide sympathetic resonance, with the intention of enriching the treble register of the piano. In the "octave duplex" piano by Hoerr of Toronto, each note had four strings, of which two, three or four could be struck by the hammer depending on the depression of any of four pedals. Steinway’s duplex scale was inspired a half century earlier by an experiment conducted by the German piano maker Wilhelm Leberecht Petzoldt, in which a small bridge was placed behind the standard larger one with the intention of maximizing the potential additional resonance of a sympathetically vibrating additional length of string.

Overtones due to string resonance on the koto

The following table [ [http://www.music.sc.edu/fs/bain/atmi02/cents/default.html BAIN ATMI 2002: Cents/RatioToCents Appl ] ] [ [http://www.xs4all.nl/~huygensf/doc/intervals.html Stichting Huygens-Fokker: List of intervals ] ] shows the created resonating overtones on the koto for various positions on a stopped string (the proportion being between the "played" portion of the string and resonant portion, the remaining length of the string).

Instruments that utilize string resonance

*Baryton
*Bazantar
*Crwth
*Dilruba
*Esraj
*Gadulka
*Gottuvadhyam
*Hardingfele
*H'arpeggione
*Koto
*Modern versions of the nyckelharpa
*Mohan veena
*Piano (right pedal)
*Prepared guitar
*Prepared piano
*Rubab
*Sarangi
*Sarod
*Sitar
*Tambura
*Ten-string guitar
*Ukelin
*Viola d'amore
*Tar (lute)
*Setar

References

ee also

*Aliquot stringing
*Drone
*Resonance
*Sympathetic string
*List of meantone intervals


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