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Acoustical and perceptual influence of duplex stringing in grand pianos
KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH, Music Acoustics.
KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH, Music Acoustics.ORCID iD: 0000-0002-0144-7205
2012 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 131, no 1, 856-871 p.Article in journal (Refereed) Published
Abstract [en]

This study investigates the acoustical and perceptual influence of the string parts outside the speaking length in grand pianos (front and rear duplex strings). Acoustical measurements on a grand piano in concert condition were conducted, measuring the fundamental frequencies of all main and duplex strings in the four octaves D4-C8. Considerable deviations from the nominal harmonic relations between the rear duplex and main string frequencies, as described by the manufacturer in a patent, were observed. Generally the rear duplex strings were tuned higher than the nominal harmonic relations with average and median deviations approaching _50 cent. Single keys reached +190 and -100 cent. The spread in deviation from harmonic relations within trichords was also substantial with average and median values around 25 cent, occasionally reaching 60 cent. Contributions from both front and rear duplex strings were observed in the bridge motion and sound. The audibility of the duplex strings was studied in an ABX listening test. Complete dampening of the front duplex was clearly perceptible both for an experiment group consisting of musicians and a control group with naive subjects. The contribution from the rear duplex could also be perceived, but less pronounced.

Place, publisher, year, edition, pages
2012. Vol. 131, no 1, 856-871 p.
Keyword [en]
LISTENING TESTS, VIBRATIONS, TEMPERAMENT, MODULATION, TONES, TOUCH
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Identifiers
URN: urn:nbn:se:kth:diva-52256DOI: 10.1121/1.3664049ISI: 000299131200021Scopus ID: 2-s2.0-84855914391OAI: oai:DiVA.org:kth-52256DiVA: diva2:465552
Note
tmh_import_11_12_14. QC 20120402Available from: 2011-12-14 Created: 2011-12-14 Last updated: 2017-12-08Bibliographically approved

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Askenfelt, Anders

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