A Three-Dimensional Method for Analysis of the Body Mode of Classical Guitars Using a Laser Displacement Sensor.

Kuan-Cheng Su, Tsung-Yu Hsieh, Wei-Chih Lin, Fu-Li Hsiao, Tatyana Ryzhkova, Chii-Chang Chen

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Article in Sensors (Basel, Switzerland), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Kuan-Cheng SuDepartment of Optics and Photonics, National Central University, Jhung-Li, Taoyuan 320, Taiwan.

Tsung-Yu HsiehDepartment of Optics and Photonics, National Central University, Jhung-Li, Taoyuan 320, Taiwan.

Wei-Chih LinDepartment of Optics and Photonics, National Central University, Jhung-Li, Taoyuan 320, Taiwan.

Fu-Li HsiaoInstitute of Photonics, National Changhua University of Education, Changhua 500, Taiwan.ORCID 0000-0001-6362-8127

Tatyana RyzhkovaIndependent Researcher, Sudweyher Str. 13, 28857 Syke, Germany.

Chii-Chang ChenDepartment of Optics and Photonics, National Central University, Jhung-Li, Taoyuan 320, Taiwan.ORCID 0000-0001-8945-214X

Funding

National Science and Technology Council, Taiwan NSTC 112-2221-E-008-089

6 · The paper itself

Abstract

In classical guitar acoustic spectra, the lowest frequency body mode's amplitude often significantly surpasses that of the string overtones. However, the characteristics of the body mode have not been systematically utilized to quantitatively represent the timbre of classical guitars. In this study, we propose a quantitative method for describing the body mode, which can effectively differentiate the timbre of classical guitars. Our approach involves three key parameters presented in a three-dimensional space, as follows: the frequency and quality factors of the body mode, along with the amplitude ratio of the plucked string note to the body mode in the soundboard's vibration spectrum. This representation allows for the visualization, quantitative comparison, and classification of the body mode note and damping properties across classical guitars. The differences in body mode among guitars can be analyzed quantitatively using Euclidean distance.

Indexed as

acoustic spectrabody modeclassical guitarslaser displacement sensortimbre

Identifiers

PMID39204843

DOI10.3390/s24165147

PMCPMC11360423

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