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Waves
Guitar String Waves and Musical Notes
Description
Guitar string waves depend on linear mass density, tension, and string length. Linear mass density means the mass per unit length of the string. When the density stays constant along the string, it equals the total mass divided by the total length. Changing this linear density can change the wave speed.
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Transcript
当拨动低 E 弦时,具有标准有效琴弦长度的六弦吉他会弹奏基频。如果低 E 弦的线性密度已知,那么它的张力是多少?
基本波长是有效字符串长度的两倍。
波速是基波波长乘以基频。
现在,琴弦的张力是琴弦的线性质量密度乘以波速的平方。
波速的表达式在张力方程中被替换。
将有效琴弦长度、基频和线性质量密度的值代入方程中,以获得需要调整低 E 琴弦所需的张力。
请注意,频率与有效琴弦长度成反比。
因此,通过在任何品格上按下有效琴弦长度来缩短它时,可以弹奏高于设定频率的频率。
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