我跟三个人一起唱觉得挺好,自己一唱就不行了。什么道理?


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送交者: 短江学者 于 2010-12-18, 22:37:30:

回答: 唱罢,洗耳恭听。 由 潜伏九号 于 2010-12-18, 22:21:29:

Assume that A and B are singing together and that the correct sound is sin(w). But A does sin(w+d) and B does sin(w+c), with d and c small comparing to w. Then the sum sound would be

sin(w+d)+sin(w-c)= 2sin[w+0.5(d-c)]cos[0.5(d-c)].

since d-c is very small so this is approximately 2sin(w). This says that if several bad singers are not all bad in the same direction they can correct each other. One can see this in high school performance :)




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