The production of phantom partials due to nonlinearities in the structural components of the piano
The production of phantom partials due to nonlinearities in the structural components of the piano
复制标题
由于钢琴结构部件的非线性而产生幻像分音
DOI：
10.1121/1.5006351
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Moore, Thomas R.
中科院分区：
文献类型：
--
作者：
Rokni, Eric;Neldner, Lauren M.;Adkison, Camille;Moore, Thomas R.
幻象泛音是钢琴声音频谱中的异常泛音，出现在琴弦自然泛音的和频和差频处。虽然它们通常被认为是由琴弦中的强制纵波产生的，但对在所有琴弦都阻尼的情况下机械振动音板产生的钢琴声音的分析表明，在没有琴弦运动的情况下可能会出现幻象分音。效应的大小得出这样的结论：非弦乐分量中的非线性可能是幻像分音中的部分功率的原因。
Phantom partials are anomalous overtones in the spectrum of the piano sound that occur at sum and difference frequencies of the natural overtones of the string. Although they are commonly assumed to be produced by forced longitudinal waves in the string, analysis of the sound of a piano produced by mechanically vibrating the soundboard while all the strings are damped indicates that phantom partials can occur in the absence of string motion. The magnitude of the effect leads to the conclusion that nonlinearity in the non-string components may be responsible for some of the power in the phantom partials.