music&physical 物理弦振动与音乐和弦的关系

music wire vibration
The music wire(琴弦) will come into being The string standing wave; the wave length can equal 2L/n; when n=1,n=2,n=3 was been showed by the picture on the left, we know the same wire can exist The string standing wave which n=1,2,3 ..n…; we can know that The string standing wave which n=1,2,3 ..n…can exist in the same wire at the same time ,so we can say they are harmonious.they can consist of The chord(和弦);
Music&physical
王思望 111100531
musical scale（音阶）
Equal Temperaments（十二平均律）
We can know thaBiblioteka Baidu from bass C to high tone C have been Divided into 12 parts, and the frequency between two adjoining scale is Fx+1=Fx 12 2 ;the frequency change between two adjoining scale are not equal；
Which tones is harmonious ?(哪些音调 和谐)
Take a example :see from the table that we can know c-e-g is consonant（谐音的），in the C Major(c 大调) c-e-g change to Numbered musical notation is 1-3-5; it also can consist of The C chord(c和弦)，why that can get harmonic?


bamboo flute and Air vibration(空气 震动)
the air vibration in the bamboo flute can Standing wave ;we can see the bass tone 1 and the high tone 1 have the same Fingering(指法)；why the same Fingering can creat different tone ? we can know different tone with the standing wave lenth is 2L/n(n=1.2.3…..n) can exit in the same flute at the same time ;in the other word ,if the tone key is C（音高为 C）in the C major(C大调),the bass 1 and the high tone 1 is exist in the same time ,when we heart the bass 1 when we play the flute and blowing slowly;the reason is when we blowing slowly ,the standing wave shake Strongly which wave lenth longer; when we blowing rapidly,we can hear the high tone 1 with the same fingering;because the standing wave shake Strongly which wave lenth shorter;
Why the 1-3-5 can consist of the c chord
• We know the frequency of high tone of C is two times as much as bass C ,we consider they wave length is L and 2L;they can exist in the same wire at the same time so that they are harmonious. • In a word, all the (c-c’,d-d’,e-e’,f-f’…….b-b’)is harmonious; • From C to G is at a distance of 7 musical scale;from G to G’ at a distance of 19 12 12 musical scale;so CE’is 19 musical scale, the frequence :Fe’=Fc 2 , 19 2.99 = 12 2 • So c-g’is harmonious.g-g’also harmonious.so we can know c-g is harmonious; • On the same way, we can get that c-e also harmonious. • So,1-3-5,c-e-g,is harmonious,they can consist of the c chord
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