(4)共振检验法 共振检验法是利用沉音列共振原理,检验不易听辨的低音弦音准的一种方法。可用于筝的几个最低音和大阮、大三弦、拉阮等低音乐器的低音定弦。理论是把最低音看作是其上方八度音(其它琴弦)的第一“沉音”,或者是其上方两个八度音的第三“沉音”。当演奏八度音时即引起低音弦的共振。检验时,用左手指轻浮于低音 (4) resonance test Resonance test is the use of sinking sound resonance principle, the test is not easy to hear a bass note of a standard method. Can be used for a few of the lowest bass guitar and big Nguyen, big three strings, pull Nguyen bass and other bass strings. The theory is to think of the bass as the first “sonic” above the octave (other strings), or the third “sonic” above the two octaves. When playing octaves, the bass strings resonate. Test, the left hand flickering in the bass