为什么电钢琴需要像钢琴一样的琴弦共鸣
<span style="font-size:10.5pt"><span style="font-family:等线"><b><span style="font-size:11.5pt"><span style="font-family:宋体"><span style="color:#444444">琴弦共鸣</span></span></span></b></span></span><br><span style="font-size:10.5pt"><span style="background:white"><span style="font-family:等线"><b><i><span style="font-size:11.5pt"><span style="font-family:宋体"><span style="color:#7b7f83">（一）什么是琴弦共鸣？（二）高音区与低音区的琴弦共鸣</span></span></span></i></b><b><i><span style="font-family:宋体"><span style="color:#7b7f83">（三）为什么电钢琴需要像钢琴一样的琴弦共鸣？</span></span></i></b></span></span></span><br><span style="font-size:10.5pt"><span style="font-family:等线"><b><span style="font-family:宋体"><span style="color:#444444">（一）什么是琴弦共鸣？</span></span></b></span></span><br><br><span style="font-size:10.5pt"><span style="font-family:等线"><span style="font-family:宋体"><span style="color:#444444">比如我们在钢琴上弹奏一个某音符</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">A</span></span><span style="font-family:宋体"><span style="color:#444444">的时候，其他的琴弦，只要没有被止音器止住，这时会出现两种情况：</span></span><br><br><span style="font-family:宋体"><span style="color:#444444">一，该琴弦对应的琴键被按下；二，钢琴右踏板被踩下，全体止音器打开；这两种情况都会使钢琴发出振动，产生微妙的声音，这种声音我们称为</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">“</span></span><span style="font-family:宋体"><span style="color:#444444">琴弦共鸣音</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">”</span></span><span style="font-family:宋体"><span style="color:#444444">。如果其他琴弦的基音或各个等次的泛音，与音符</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">A</span></span><span style="font-family:宋体"><span style="color:#444444">的基音或泛音在频率上重合的时，这些琴弦共鸣音会更加明显，音量会更大。</span></span><br><b><span style="font-size:11.5pt"><span style="font-family:宋体"><span style="color:#444444">（二）高音区与低音区的琴弦共鸣</span></span></span></b><br><b><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">1</span></span></b><b><span style="font-family:宋体"><span style="color:#444444">、高音区</span></span></b><span style="font-family:宋体"><span style="color:#444444">钢琴高音区的</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">E3~C5</span></span><span style="font-family:宋体"><span style="color:#444444">是没有止音器的，即使不踩踏板，弹奏其他音符，这些高音区的琴弦也都会产生琴弦共鸣音，是钢琴音效不可或缺的部分。</span></span><br><b><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">2</span></span></b><b><span style="font-family:宋体"><span style="color:#444444">、低音区</span></span></b><span style="font-family:宋体"><span style="color:#444444">根据物理原理，低音区的琴弦，产生琴弦共鸣音的能力越强，主要有这几个表现：（</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">1</span></span><span style="font-family:宋体"><span style="color:#444444">）越容易被引发琴弦共鸣，越容易被附近的琴弦振动所</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">“</span></span><span style="font-family:宋体"><span style="color:#444444">感染</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">”</span></span><span style="font-family:宋体"><span style="color:#444444">。最低音那几根琴弦，甚至会被高音区的琴弦振动引发琴弦共鸣。（</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">2</span></span><span style="font-family:宋体"><span style="color:#444444">）琴弦共鸣的音量会越大，持续时间会越长。（</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">3</span></span><span style="font-family:宋体"><span style="color:#444444">）琴弦共鸣音的频率越多样。最低音那几根琴弦，甚至能</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">“</span></span><span style="font-family:宋体"><span style="color:#444444">呼应</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">”</span></span><span style="font-family:宋体"><span style="color:#444444">整台钢琴的所有琴弦，发出各种音高和强度的琴弦共鸣音。</span></span><br><b><span style="font-size:11.5pt"><span style="font-family:宋体"><span style="color:#444444">（三）为什么电钢琴需要像钢琴一样的琴弦共鸣？</span></span></span></b><br><span style="font-family:宋体"><span style="color:#444444">如果想要电钢琴有真钢的丰富细腻声音，那这台电钢必须具备琴弦共鸣音。而琴弦共鸣对电钢琴有较高要求：首先，该电钢琴必须具备琴弦共鸣的功能，并且琴弦共鸣还要完整，方可较好地展现原声；其次，电钢琴要想完整地做出琴弦共鸣的效果，除了正在被弹奏的音符之外，还要额外增加很多的声音进去，这些音符、声音都是要占用复音数的，这时就对复音数有要求了，至少需要</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">256</span></span><span style="font-family:宋体"><span style="color:#444444">个才够用。上节复音数有建议复音数</span></span><span lang="EN-US" style='font-family:"PingFangTC-light",serif'><span style="color:#444444">192</span></span><span style="font-family:宋体"><span style="color:#444444">个以上或更多，就是因为琴弦共鸣以及弹奏音符多速度快的曲子的时候，都需要足够多的复音数，只有足够多的复音数才能支撑琴弦共鸣与其它快速复杂曲目，电钢琴才能有真钢的味道。所以，还是那句话预算允许的情况下，尽量购买最大复音数会比较好。</span></span></span></span><br>
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