当小提琴与长笛演奏同一音高时，人们也可以区别开这两种乐器的声音，因为这两种声音的音色不同。乐音是由基音与泛音（谐波）组成的，泛音频率比基音频率高，一般我们常提到的是二次谐波、三次谐波与五次谐波。这种泛音列的不同即形成了各种各样的音色。即使是同一件乐器（如 When the violin and flute play the same pitch, one can also distinguish the sounds of the two instruments because the voices of the two sounds are different. The tone is composed of pitch and overtone (harmonics), the overtone frequency is higher than the pitch, in general we often refer to the second harmonic, the third harmonic and the fifth harmonic. This overtone column is the formation of a variety of different voices. Even the same instrument (eg