Hardangerfele, showing sympathetic strings underneath playing strings

Sympathetic strings or resonance strings are auxiliary strings found on many Indian musical instruments, as well as some Western Baroque instruments and a variety of folk instruments. A Hardanger fiddle (or in hardingfele is a traditional Stringed instrument used originally to play the Music of Norway. The music of India' includes multiple varieties of folk, popular, pop, and classical music. They are typically not played directly by the performer (except occasionally as an effect) only indirectly through the tones that are played on the main strings, based on the principle of sympathetic resonance. Sympathetic resonance is a Harmonic phenomenon wherein a formerly passive string or vibratory body responds to external vibrations to which it has a harmonic likeness The effect is most often heard when the fundamental frequency of the string is in unison or an octave lower or higher than the catalyst note, although it can occur for other intervals, such as a fifth, with less effect. The fundamental tone, often referred to simply as the fundamental and abbreviated fo, is the lowest frequency in a harmonic series. In Music, an octave ( is the the use of which is "common in most musical systems In Music theory, the term interval describes the relationship between the pitches of two Notes Intervals may be described as vertical The perfect fifth ( is the Musical interval between a note and the note seven Semitones above it on the musical scale

The musician retunes the sympathetic strings for each mode or raga, so that when the corresponding note (or one an octave below it) is played on the main strings of the instrument, the sympathetic strings (called tarabs in Indian music) will vibrate in response, providing a lingering halo of sound. In Music, a scale is an ordered series of Musical intervals which along with the key or tonic, define the pitches However mode Rāga ( Sanskrit, lit "colour" or "mood" or rāgam in Carnatic music) refers to melodic modes used

Sympathetic strings are used to enhance the sound of an instrument. Some instruments have only few sympathetic strings such as the Hardangerfele in the picture. Indian instruments in this class include the sitar and sarod with 15 sympathetic strings, and the sarangi which has a total of 37 sympathetics. The sitar ( Hindi: सितार Urdu: ستار Persian: سی تار) is a Plucked stringed instrument. The sarod is a stringed musical instrument used mainly in Indian classical music. The Sarangi ( Hindi In Western music, some members of the viola family appeared in the middle of the 17th century, which were fitted with an extra choir of thin wire strings running through a hollow chamber through the neck of the instrument, the head of which was then elongated to accommodate as many extra tuning pegs as necessary. The viola is a bowed String instrument. It is the middle voice of the Violin family, These were generally called viola d'amore; another historical example is the baryton, for which Haydn wrote many trios. The viola d'amore ( Italian: love Viol) is a 7- or 6- stringed Musical instrument with Sympathetic strings used chiefly in the baryton is a bowed String instrument in the Viol family in regular use in Europe up until the end of the 18th century Other instruments such as the harp, lute, guitar, harpsichord and piano do not have additional strings, but make use of the effect by allowing their playing strings to vibrate sympathetically when they are not being played directly. The harp is a Stringed instrument which has the plane of its strings positioned perpendicular to the soundboard. Lute can refer generally to any plucked string instrument with a neck (either Fretted or unfretted and a deep round back or more specifically to an instrument from The guitar is a Musical instrument with ancient roots that is used in a wide variety of musical styles A harpsichord is a Musical instrument played by means of a keyboard. The piano is a Musical instrument played by means of a keyboard that produces sound by striking steel strings with Felt covered hammers In keyboard instruments like the piano, the string dampers can be raised to produce this effect.

The guitar is normally unable to produce effective sympathetic string resonance for tones other than E (resonance from the 6th and 5th strings, tuned to E and A, respectively), B (from the 6th string), D (from the 4th string), and A (from the 5th and 4th strings). The guitar is a Musical instrument with ancient roots that is used in a wide variety of musical styles (The treble strings are negligible in practice, as they are almost constantly being fingered. ) However, the ten-string guitar , invented in 1963 by Narciso Yepes, adds four strings tuned to C, A♯, G♯, F♯, which resolves the imbalance of resonance on the guitar. This article is about modern ten-string guitars For the five-course guitar with nine or ten strings see Baroque guitar. Narciso Yepes ( November 14, 1927 – May 3, 1997) was a Spanish guitarist. By adding the abovementioned resonances and, of course, their fifths (the fifth being a strong resonant frequency)—that is to say, G, F, D♯, C♯—the guitar's strings now resonate more equally with all 12 notes of the chromatic scale, bringing the guitar's sound closer to the consistency and sustainability of the harpsichord and piano. In Physics, resonance is the tendency of a system to Oscillate at maximum Amplitude at certain frequencies, known as the system's A harpsichord is a Musical instrument played by means of a keyboard. The piano is a Musical instrument played by means of a keyboard that produces sound by striking steel strings with Felt covered hammers ^[1][2][3]

Sympathetic string resonance in music instruments

Main article: String resonance (music)

Strings or parts of strings may resonate at their fundamental or harmonic frequencies when other strings are sounded. String resonance occurs on String instruments. Strings or parts of strings may resonate at their Fundamental or Overtone frequencies when other strings In Acoustics and Telecommunication, the harmonic of a Wave is a component Frequency of the signal that is an Integer In general, non-played strings respond in sympathy to other strings being played. Two tones of the same pitch will give maximum sympathetic resonance as all harmonics of both strings will overlap. Other harmonic combinations will cause sympathetic resonance at the fifth, fourth and major third. 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 (third overtone of A and fourth overtone of E).

Instruments with sympathetic strings

References

See also

• Aliquot stringing
• Drone (music)