The mysteries of Physics drum up music from classical to Quantum Science and technology Sohu txplatform

The mysteries of Physics: drum up music from classical to Quantum Science and technology Sohu author Wu Jike (Professor of Peking University) Nietzsche once said: without music, life is of no value. Music has permeated our life, and few people don’t like listening to music. However, when you are intoxicated with the sound of music, you can know which contains a lot of scientific knowledge? How to determine the pitch? How does a musical instrument sound? Can timbre be simulated?…… In the field of art music, many fields of mathematics, physics, physiology, psychology, computer science, electronics and other closely blend together, like Pythagoras, Galileo, the history of Newton, Helmholtz, Zhu Zai?, Weber’s famous mathematicians, scientists, musicians have left footprints in this exploration. But until today, behind the music and sound scientific reason has not yet fully understood, for example, the development of new audio equipment, computer simulation of singing, are still faced with many problems unsolved. The scientific problems behind music, first of all, are mechanical problems. Because the production and dissemination of sound itself is a typical mechanical problems, the development and improvement of musical instruments, whether it is wind instruments or string instruments, or other musical instruments, are inseparable from the in-depth knowledge of mechanics. Today we focus on the relationship between pitch and frequency, and stringed instruments and wind instruments (i.e. "silk" and "bamboo") of the two samples of the main physical and mechanical instruments law closely to talk about in music. We can see that the development of mechanics and science not only enriches the music, but also enriches the scientific research. Before the relationship between the pitch and the frequency of the sound, the pitch of the sound is measured by the length of the string. The chord length minus half pitch rise eight degrees. As early as the spring and Autumn Period in China, "Guanzi" a book on the records of the "three profit" rules, namely the chord length is shortened by 1/3, higher pitch five degrees, and then again after the growth of 1/3, to get high degree than the original sound. This is the five profit and loss each time, so go on, get a series of harmonious tone. This method of calibration of the relationship between different and homophonic called "five generation" law. In the west of ancient Greece, in the same time of Pythagoras also got the same rules. Two separated sound frequency ratio of eight degrees is 2, Chinese core mission is in a eight degree found in other important notes. It was found that with five degrees of health law six times, repeated loss increased six times, a total of 12 times, can get 12 sound, but the sound of twelfth still have distance from true that eight degree sound, and the frequency ratio of adjacent notes are not equal, makes it difficult to transfer. In order to solve this problem, the Ming Dynasty Zhu China musician (1536, 1611) contained? In Wanli twelve years (1584) first proposed the "new density" (see "the essence of" Lulu, "law book"). He will correspond to a eight degree between the 12 tone chord, according to the 2 open 12 times, namely, changes in the proportion of =1.059463094359295264561825, a sound increases every one tone on!相关的主题文章: