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过去,对音臂的低频谐振进行过许多研究并发表了有关的报导,但是,对支轴的最佳位置在音臂的什么地方这一问题似乎一直没有分析过。本文提出了音臂的静态重心和动态重心两个新概念。并根据这两点的关系分析了最佳支轴位置。发现当音臂受到来自唱针尖的一个力或来自支轴的任何振动传送到唱针尖的时候,音臂的直线运动和旋转运动就相互抵消。因此,可以计算出音臂的最佳支轴位置,把最佳支轴位置的理论和其他学者及工程师们提出的音臂动态阻尼理论联系起来,以获得对音臂低频谐振的更有效的阻尼。
In the past, there have been many studies and published reports on the low-frequency resonance of the acoustic arms. However, it seems that the problem of where the fulcrum’s optimum position is on the acoustic arm has never been analyzed. In this paper, two new concepts of static center of gravity and dynamic center of gravity are put forward. According to the relationship between these two points, the optimal spindle position is analyzed. Found that when the sound arm by a force from the tip of the tip or any vibration from the fulcrum sent to the tip of the needle when the arm of the linear motion and rotary motion offset each other. Therefore, the best support shaft position of the boom can be calculated, and the theory of the optimal pivot position can be linked with the dynamic arm damping theory proposed by other scholars and engineers to obtain more effective dampening of the low-frequency resonance of the boom .