• 한국잠사학회:학술대회논문집
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• 한국잠사학회 2003년도 International Symposium of Silkworm/Insect Biotechnology and Annual Meeting of Korea Society of Sericultural Science
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• pp.57-57
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• 2003

Kayagum strings are usually made of raw silk. It is in need of good vibration and durability during playing the Kayagum. This study was carried out to increase durability of the strings by treatment of water soluble acrylic adhesive. (omitted)

• 한국잠사곤충학회지
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• 제47권1호
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• pp.41-47
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• 2005

1. 가야금 줄의 내구성을 향상시키기 위하여 가야금 줄에 acrylic adhesive와 poly(vinyl alcohol)을 병용 처리한 결과 강려과 신도는 차이가 없었으나 하중 70%에서 절단할때까지의 반복회수는 화학가공처리 현이 무 처리한 현보다 48% 향상되었으므로 현의 내구성을 크게 향상시킬 수 있었으나 흡습율이 무처리 현보다 높았다. 2. 현의 내구성을 증대시키고 음량을 풍부하게 할 목적으로 생사와 polyester사의 혼합비율을 달리하면서 생사/폴리에스텔 복합현을 제조하고 물성을 조사한 결과 polyester사의 비율이 많아질수록 강력이 감소하였고 신도는 증가하여 가야금 줄로서 적당하지 않았으나 mono filament 사로서 강력이 우수한 polyester사를 사용하여 복합현을 만든 SSP 복합현의 경우 생사로 만든 현보다 강력이 우수하였다. 3. 새로운 현의 소재를 개발하기 위하여 생사(가잠사)와 작잠사와의 복합현을 제조하고 그 물성을 조사한 결과 가잠사/작잠사 복합현의 강력은 작잠사와 비율이 많아질수록 저하되었다.

• Journal of the Korean Wood Science and Technology
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• 제25권2호
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• pp.61-66
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• 1997

Paulownia wood has been used as sound board for Korean traditional musical instruments such as Keomungo(Korean lute), Kayagum(twelve-stringed Korean harp) and Changgu(hour-glass shaped drum), etc. The acoustic properties of wood affected not only by dimensions but also by density and stiffness of wood. Due to inhomogeneity and hygroscopicity of wood. the acoustic properties of wood are inconsistent. To clarify the effect of moisture content and air dry density on acoustic properties, longitudinal vibration experiment was accomplished in 3 moisture content levels of 9.6, 11.1 and 12.5% and in 3 air dry density levels of 0.22, 0.25 and 0.28g/$cm^3$. The results were as follows: As the moisture content increased, the fundamental frequency. specific dynamic Young's modulus and sound velocity decreased, but the internal friction increased so that loss of energy increased. The values in damping of sound radiation were rapidly decreased at 12.5%. It meant that the damping of internal friction was larger than damping of sound radiation at high moisture content. As the air dry density increased, the fundamental frequency, specific dynamic Young's modulus and sound velocity increased, but the internal friction and damping of sound radiation decreased so that loss of energy decreased. And acoustic converting efficiency was hardly influenced by increasing air drying density.