Production of high quality materials for guitar top and back plate made from Japanese cedar logs with a small diameter.

采用小直径日本雪松原木生产优质吉他面板和背板材料。

• 批准号: 06660219
• 负责人: YANO Hiroyuki
• 金额: $ 1.34万
• 依托单位: KYOTO PREFECTURAL UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06660219/
• 关键词: Japanese cedar logs with a small diameter; Acoustic materials; Guitar; Piano; Specific dynamic Young's modulus; Loss tangent; Sound board; スギ; ドイツトウヒ; ブラジリアンローズウッド

New type of wood-based materials as substitutes for Brazilian rosewood for guitar back plate and German spruce for guitar top plate were produced based on Japanese cedar logs with a small diameter, of which the utilization is limited despite its availability. The sapwood portion of logs 20 cm in diameter was processed to a veneer 2 mm using a rotary lathing machine. The veneers were laminated in parallel after impregnation with low molecular weigh phenolic resin, and compressed perpendicular to the plane. When the veneers were treated with 3 or 5% aqueous solution and compressed to a density of 0.8 without adhesives, the specific dynamic Young's modulus (E/gamma) and tan delta of the materials became almost the same as those of Brazilian rosewood in the lower frequency range not only in the longitudinal direction but also in the cross-longitudinal direction. When the veneers were treated with 5% aqueous solution and compressed to a density of 0.4 with adhesives, the E/gamma and tan delta of the materials were almost comparable to those of German spruce in the longitudinal direction. The tone quality of guitars used resin-impregnated veneer board for its top and back plate were comparable to that of guitars with a top plate of German spruce and a back plate of Brazilian rosewood.

新型木基材料作为吉他背板的巴西花梨木和吉他顶板的德国云杉的替代品，是基于直径较小的日本雪松原木生产的，尽管其可用性有限，但其利用率有限。使用旋转车床将直径为20 cm的原木的边材部分加工成2 mm的单板。单板浸渍低分子量酚醛树脂后平行层压，并垂直于平面压缩。当单板用3%或5%的水溶液处理，并压缩到密度为0.8没有粘合剂，特定的动态杨氏模量（E/γ）和tan δ的材料变得几乎相同的巴西紫檀木在较低的频率范围内，不仅在纵向方向，而且在横向纵向方向。当单板用5%的水溶液处理并用粘合剂压缩至密度为0.4时，材料的E/γ和tan δ在纵向上几乎与德国云杉相当。吉他的音色质量使用树脂浸渍胶合板的顶部和背板是可比的吉他与德国云杉的顶板和巴西玫瑰木的背板。

项目成果

矢野浩之 他3名: "ギタ-裏板用ブラジリアンローズウッド材の音響特性" 木材学会誌. 41. 17-24 (1995)

Hiroyuki Yano 等 3 人：“吉他背板用巴西红木的声学特性”日本木材学会杂志 41. 17-24 (1995)。

Hiroyuki Yano: "Chemical treatment of wood for musical instruments" J.Acoust.Soc.Am.96. 3380-3391 (1994)

Hiroyuki Yano：“乐器用木材的化学处理”J.Acoust.Soc.Am.96。

矢野浩之: "ギタ-裏板用ブラジリアンローズウッド材の音響的性質" 木材学会誌. 41. 17-24 (1995)

Hiroyuki Yano：“吉他背板用巴西红木的声学特性”日本木材学会杂志 41. 17-24 (1995)。

H. Yano, K. Minato and H. Kajita: "Chemical treatment of wood for musical instruments" J. Acoust. Soc. Am.96. 3380-3391 (1994)

H. Yano、K. Minato 和 H. Kajita：“乐器用木材的化学处理” J. Acoust。

Hiroyuki Yano: "Acoustic properties of Brazilian rosewood used for guitar back plates" Mokuzai Gakkaishi. 41. 17-24 (1995)

Hiroyuki Yano：“用于吉他背板的巴西红木的声学特性”Mokuzai Gakkaishi。