摘要
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。
This paper studied the effect of striking point and dynamics at string on the amplitude spectrum of a piano from theory and spectrum analysis experiment.Firstly,a theoretic equation of the velocity amplitude is presented with vibration theory of string.Then,the audio recording of a piano is analyzed and processed by computer and an amplitude spectrum of the piano is obtained.Finally,the effect of striking force and striking point at string on the amplitude spectrum are discussed.The result shows that although the relationship between the value of amplitude spectrum and the velocity ampli-tude is not simply correlated,they are proportional to each other indeed.The variation of the ratio of different partials can be easily realized by adjusting the value of A/L.[
出处
《电声技术》
北大核心
2003年第12期6-9,共4页
Audio Engineering
基金
广州市科学技术攻关项目资助(2001-68-01).
关键词
击弦点
击弦力度
钢琴
幅度谱
速度振幅
striking point at string
striking dynamics at string
piano
amplitude spectrum
