Normal modes of a small gamelan gong

Robert, Perrin and Daniel, P. Elford and Luke, Chalmers and Gerry, M. Swallowe and Thomas, R. Moore and Sinin, Hamdan and Benjamin, J. Halkon (2014) Normal modes of a small gamelan gong. The Journal of the Acoustical Society of America, 136 (4).

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Official URL: http://scitation.aip.org/content/asa/journal/jasa/...

Abstract

Studies have been made of the normal modes of a 20.7 cm diameter steel gamelan gong. A finite-element model has been constructed and its predictions for normal modes compared with experimental results obtained using electronic speckle pattern interferometry. Agreement was reasonable in view of the lack of precision in the manufacture of the instrument. The results agree with expectations for an axially symmetric system subject to small symmetry breaking. The extent to which the results obey Chladni's law is discussed. Comparison with vibrational and acoustical spectra enabled the identification of the small number of modes responsible for the sound output when played normally. Evidence of non-linear behavior was found, mainly in the form of subharmonics of true modes. Experiments using scanning laser Doppler vibrometry gave satisfactory agreement with the other methods.

Item Type: Article
Uncontrolled Keywords: small gamelan gong, engineering, experimental measurement, Gong geometry, UNIMAS, Universiti Malaysia Sarawak
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Depositing User: Karen Kornalius
Date Deposited: 29 Oct 2014 04:40
Last Modified: 11 Mar 2015 04:06
URI: http://ir.unimas.my/id/eprint/5241

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