SciELO - Scientific Electronic Library Online

 
vol.17 número4Densidad y propiedades mecánicas de la madera de Acacia melanoxylon implantada en ArgentinaEffects of nano-wollastonite on physical and mechanical properties of medium-density fiberboard índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Maderas. Ciencia y tecnología

versão On-line ISSN 0718-221X

Resumo

SE GOLPAYEGANI, Aida et al. The effect of traditional hygro-thermal pretreatments on the acoustical characteristics of white mulberry wood (Morus alba). Maderas, Cienc. tecnol. [online]. 2015, vol.17, n.4, pp.821-832. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2015005000071.

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.

Palavras-chave : Damping coefficient; extractives; vibrational properties; seasoning; water soaking.

        · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons