Journal
APPLIED ACOUSTICS
Volume 182, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apacoust.2021.108275
Keywords
Physics-based modelling; Virtual prototyping; Uncertainty quantification; Screening analyses; Guitar braces; Spruce tonewood
Categories
Funding
- [ANR-17-EURE-0002]
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This study investigates the impact of different acoustic guitar bracing patterns on the instrument's sound. It is shown that the design choices of bracing patterns have a significant influence on the dynamic behavior in the low frequency domain. This research emphasizes the importance of detailed physics-based models in understanding, designing, and making guitars.
It is generally alleged that the design choices of acoustic guitar bracing patterns lead to a specific sound of the instrument. However, in the presence of strong uncertainties due to variability of material properties and climatic conditions, the robustness of the soundboard dynamics has yet to be investigated. In this study, three types of bracing patterns are studied using physics-based models and stochastic analyses are performed to account for material and climatic uncertainties. It is shown that the choice of a brace design leads, at least in the low frequency domain, to a dynamic behaviour that is not stackable with another design, even in the presence of strong aleatory uncertainties. This assessment supports the conjecture that guitar brace design choices have a greater impact than material variability where guitar soundboard dynamics are concerned. More generally, these results illustrate the usefulness of detailed physics-based models in the understanding, design and making of guitars. (C) 2021 Elsevier Ltd. All rights reserved.
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