对二胡结构的理性思考及建议

Rational thinking and suggestion to the structure of erhu

二胡的弦与琴杆的距离适当,是演奏者能保持正确手形的必要条件,由于琴杆左侧至琴筒右端面距离一定,青少年及手指较短的演奏者不得不把千斤调短,使弦线过于倾斜.据二胡的演奏方法和振动规律,通过分析,从理论上指出了这将导致琴弦和琴皮的振幅都要变小,结果音量变小,不易演奏强弱变化的音型;同时不易实现"滚压结合式"揉弦中的"压";提出在制作上的改进建议.

The proper distance between the string of erhu and the pole of the instrument is the essential condition for the player to keep the correct hand shape.Because the distance from the left side of the pole to the terminal surface of the musical instrument tube in the structure is certain,the juvenile players or the players with smaller fingers have to adjust QianJin short,make the string thread overly slope.According to the erhu playing method and vibration characteristics and through the analysis,it points out this causes the amplitude of the string and instrument leather diminished theoretically,making volume lower and difficult to play the figure of power change consequently;At the same time it is difficult to realize the way of rub 'pressing' of string in 'roll and press combination'.Suggestions has proposed for mannfacturing the instrument.