Effect of Heat Treatment on the Acoustic Properties of a Wooden Xylophone Keyboard

• Kang Ho-Yang

  Department of Bio–based Materials, Chungnam National University

• Kang Chun-Won

  Department of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Chonbuk National University

• Hong Seung-Hyun

  Department of Bio–based Materials, Chungnam National University

• 松村 順司

  九州大学大学院農学研究院環境農学部門サスティナブル資源科学講座木質資源科学研究分野

抄録

To estimate changes in the acoustic properties of a wooden xylophone keyboard caused by heat treatment, the resonant frequencies and logarithmic decrement of control and heat–treated specimens of Yezo spruce (Picea jezoensis), Northern red oak (Quercus rubra) and Japanese red pine (Pinus densiflora S. et Z.) were evaluated by the free vibration method. A flexural vibration test was carried out by the xylophone stick free fall impact test. The changes in resonant frequency of the first mode and those of other modes by heat treatment were evaluated. And the changes in logarithmic decrement by heat treatment were evaluated. As a result of heat treatment, the resonant frequencies of the 1st mode of all specimens were decreased, and within a species the wood specimens of higher resonant frequencies were more influenced. In the case of the specimen with a higher resonant amplitude at the 2nd mode resonance frequency, the resonant amplitude of the 1st mode resonance frequency was increased more by heat treatment, so that the sound became more stable.

収録刊行物

• Journal of the Faculty of Agriculture, Kyushu University

  Journal of the Faculty of Agriculture, Kyushu University 61 (1), 157-163, 2016-02-29

  九州大学大学院農学研究院

キーワード

• heat treatment
• resonant frequency
• acoustic property

詳細情報

• CRID: 1390572174638194432
• NII論文ID: 120005725057
• NII書誌ID: AA00247166
• DOI: 10.5109/1564098
• HANDLE: 2324/1564098
• ISSN: 00236152
• 本文言語コード: en
• データソース種別:
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  • IRDB
  • Crossref
  • CiNii Articles