Using mechanical metamaterials in guitar top plates: a numerical study
Author
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Lercari, Mattia
Author
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González, Sebastian
Author
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Espinoza Oñate, Carolina Andrea
Author
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Longo, Giacomo
Author
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Antonacci, Fabio
Author
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Sarti, Augusto
Admission date
dc.date.accessioned
2022-12-20T15:04:17Z
Available date
dc.date.available
2022-12-20T15:04:17Z
Publication date
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2022
Cita de ítem
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Appl. Sci. 2022, 12, 8619
es_ES
Identifier
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10.3390/app12178619
Identifier
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https://repositorio.uchile.cl/handle/2250/189862
Abstract
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Featured Application The use of mechanical metamaterials in musical instruments could be an excellent way to engineer the wood of the instrument to obtain a particular sound. It has recently been shown that the mechanical properties of thin, rectangular wooden plates can be tuned by carving them with specific patterns of perforations, effectively realising a 2D wooden mechanical metamaterial. Such a material is of great interest for the construction of musical instruments, as it could allow a new degree of creative control for makers. Furthermore, issues with the shrinking supplies of tone-woods could be alleviated as wood samples that don not meet the desired requirements could simply be altered, instead of being discarded. In this work, we study the effect of the use of these metamaterials in the soundboards of classical guitars. By way of simulations, we evaluate their impact on the modal behaviour and on the sound pressure level of the instrument, as well as on its ability to sustain the load exerted by the strings. Our results show that the metamaterials can tune the instrument's response without compromising its structural integrity. We thus conclude that the use of wooden mechanical metamaterials in the soundboards of classical guitars is feasible and, in many ways, beneficial, not the least since it opens the door to using non-traditional woods with bespoke density and stiffness.
es_ES
Patrocinador
dc.description.sponsorship
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT 3200239
1190005
MSCA EF 2020 grant of Politecnico di Milano
es_ES
Lenguage
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en
es_ES
Publisher
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MDPI
es_ES
Type of license
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Attribution-NonCommercial-NoDerivs 3.0 United States