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从理论和谱分析实验研究了钢琴的击弦点及击弦力度对钢琴幅度谱的影响。首先通过弦振动理论对速度振幅进行了理论计算,然后用计算机对钢琴的原始录音进行分析和处理,得出了钢琴的幅度谱,最后讨论了击弦点及击弦力度对钢琴幅度谱的影响。结果表明,虽然钢琴的幅度谱值与速度振幅值之间不存在简单的对应关系,但两者是成正比的。欲改变各次谐波幅度谱值之间的比例关系,可以比较方便地通过调整A/L值来达到。
The theoretical and spectral analysis experiments were conducted to study the influence of the piano stringing point and the stringing force on the piano amplitude spectrum. First of all, the velocity amplitude is theoretically calculated by using the string vibration theory. Then, the original recording of the piano is analyzed and processed by computer, the amplitude spectrum of the piano is obtained. Finally, the effect of the attacking point and the stringing force on the piano amplitude spectrum is discussed . The results show that although there is no simple correspondence between the amplitude spectrum and velocity amplitude of piano, the two are proportional. To change the ratio between the harmonic amplitude spectrum values, you can more easily by adjusting the A / L value to achieve.