一台声音结实、纯正的扬琴,在使用了一段时间之后,往往会因面板鼓起而使声音变沙变虚。这种情况,主要是由于琴体支撑不住一百多根琴弦的巨大拉力而造成的。琴梆在琴弦的强拉力下发生变形,从而使整个琴体处于不稳定的状态之中,这就会给调弦(音)带来很大的不便。有时,即使好容易调准了,只要琴梆有一点微小的变化,马上会使全盘琴弦音“变花”。 A strong sound, pure dulcimer, after using for a period of time, often because of the panel bulge and make the sound changeable. This situation is mainly caused by the enormous tension of more than a hundred strings that the body can not support. The pianoforte deforms under the strong pulling force of the strings, leaving the entire body in an unstable state, which brings great inconvenience to tuning (sound). Sometimes, even if easy to align, as long as the piano a little change, immediately make the whole string sound “flower”.