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The effect of traditional hygro-thermal pretreatments on the acoustical characteristics of white mulberry wood (Morus alba)

Se Golpayegani Aida, Brémaud Iris, Thévenon Marie-France, Pourtahmasi Kambiz, Gril Joseph. 2015. The effect of traditional hygro-thermal pretreatments on the acoustical characteristics of white mulberry wood (Morus alba). Maderas. Ciencia y Tecnología, 17 (4) : pp. 821-832.

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Quartile : Q2, Sujet : MATERIALS SCIENCE, PAPER & WOOD

Abstract : The wood used in making musical instruments usually undergoes pre-treatments or conditioning. Some processes have resulted from laboratory research, while many treatments are applied by craftsmen using traditional methods that have not yet been scientifically assessed. This paper is based on laboratory methods which simulate hydrothermal pre- treatments traditionally applied by Iranian lute makers to mulberry (Morus alba), an important wood for lutes from the Middle East to Japan. By applying a cyclic process, drying (60°C) and ambient re-conditioning, which mimics wood seasoning and short-term aging, the damping coefficient (tanδ) was decreased down to 10% without negatively affecting specific modulus of elasticity (E'/ρ). Long-term (up to 4 months) soaking in cold water removed extractives, and decreased density as well as E'/ρ, but did not affect tanδ. Short-term hot water treatment removed as many extractives, but caused a smaller decrease in E'/ρ than cold water, and significantly increased tanδ. This paper helps to clarify some traditional processes used by instrument makers, and can provide a basis for necessary cross-cultural scientific studies in the future. (Résumé d'auteur)

Mots-clés Agrovoc : Bois, Propriété acoustique, Vibration, Propriété physicochimique, Propriété mécanique, Technologie du bois, Conditionnement du bois, Séchage, Trempage, Teneur en eau, Extrait, Composition chimique, Élasticité

Mots-clés complémentaires : Densité du bois, Module d'élasticité

Mots-clés libres : Damping coefficient, Extractives, Vibrational properties, Seasoning, Water soaking

Classification Agris : K50 - Processing of forest products
J12 - Handling, transport, storage and protection of forest products

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

  • Se Golpayegani Aida, UM2 (FRA)
  • Brémaud Iris, UM2 (FRA)
  • Thévenon Marie-France, CIRAD-PERSYST-UPR BioWooEB (FRA)
  • Pourtahmasi Kambiz, Université de Téhéran (IRN)
  • Gril Joseph, UM2 (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580445/)

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