2020
DOI: 10.3390/ma13081962
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Acoustic Properties of Resonant Spruce Wood Modified Using Oil-Heat Treatment (OHT)

Abstract: Wedge-shaped boards of spruce wood (Picea abies Karst.) are used to make violin fronts, also known as soundboards. Oil-heat treatment (OHT) can influence the acoustic properties of resonant wood, such as spruce. In this study, the effect of OHT on spruce wood was evaluated, using palm oil as a heating medium, at four different temperatures: 140, 160, 180 and 200 °C. Physical, mechanical and acoustic properties of spruce wood were evaluated before and after OHT and included the following: density, modulus of el… Show more

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Cited by 12 publications
(14 citation statements)
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“…The results regarding the acoustic and elastic properties of tonewood are presented in Table 5. It can be noticed that the ratios of acoustic velocities (for A grade) are in good agreement with those found in other studies, such as [12][13][14][15][21][22][23][24][35][36][37][38][39][40]. For resonant spruce, Bucur, 2006 [15], obtained the ratios: V LL /V RR = 2.8, V LL /V TT = 3.5 and V RR /V TT = 0.8.…”
Section: The Anatomical Pattern and Color Of Resonant Sprucesupporting
confidence: 89%
See 1 more Smart Citation
“…The results regarding the acoustic and elastic properties of tonewood are presented in Table 5. It can be noticed that the ratios of acoustic velocities (for A grade) are in good agreement with those found in other studies, such as [12][13][14][15][21][22][23][24][35][36][37][38][39][40]. For resonant spruce, Bucur, 2006 [15], obtained the ratios: V LL /V RR = 2.8, V LL /V TT = 3.5 and V RR /V TT = 0.8.…”
Section: The Anatomical Pattern and Color Of Resonant Sprucesupporting
confidence: 89%
“…In the radial direction, Viala et al, 2020 [21], found that the values of the specific elastic modulus vary between 1.46 and 2.78 GPag −1 cm 3 compared to the values obtained in current study, which vary between 2.43 and 2.98 GPag −1 cm 3 (Table 4). Additionally, in the longitudinal radial section the values of the specific shear modulus range from 1.86 to 2.51 GPag −1 cm 3 and are very close to those reported by [21][22][23][36][37][38][39][40]. We note that these references used different methods to determine the elastic parameters in comparison with the authors of this study.…”
Section: The Anatomical Pattern and Color Of Resonant Sprucesupporting
confidence: 87%
“…These changes were a result of the degradation of wood components, mainly the hemicelluloses, caused by high temperatures ( Table 2). Literature data suggest that ML is basically the effect of evaporation of non-structural wood components, such as terpenes, fat, wax and phenols, and the decomposition of the least stable hemicelluloses [43,44]. At the same time, it should be noted that the degree of wood degradation, and especially changes in the content of chloroform-ethanol extractives, also depend on the time of thermal treatment, which is confirmed by reference literature data [45].…”
Section: Mass Loss and Density Of Black Poplar Thermally Modified In supporting
confidence: 68%
“…However, if intermediate relative humidities, e.g., 29-64%, are used for the hygrothermal treatment then gains are actually reversible and so provide no long term solution [149]. Mania and Gasiorek [150] found hot oil treatment to have different effects based on the size of the element being treated. Small pieces absorbed comparatively high levels of oil which increased density and decreased acoustic performance.…”
Section: Acoustic Propertiesmentioning
confidence: 99%