利用声栅原理揭秘多级阶梯奇特乐音现象  

USING THE SOUND GRID PRINCIPLE TO REVEAL THE PHENOMENON OF PECULIAR MULTI-STEP MUSIC

作　　者：黄绍书 吴次南 HUANG Shaoshu;WU Cinan(Liupanshui No.23 Middle School,Liupanshui,Guizhou 553004;School of Mathematics and Physics,Anshun College,Anshun,Guizhou 561000)

机构地区：[1]六盘水市第23中学,贵州六盘水553004 [2]安顺学院数理学院,贵州安顺561000

出　　处：《物理与工程》2025年第1期178-183,共6页Physics and Engineering

摘　　要：光波经过光栅作用形成的光强分布,实际是光栅的单缝(槽)衍射和多缝(槽)干涉的共同结果。经观察发现,级数足够多的阶梯对一定强度的入射噪声反射后,在反射声场中将会获得某特定频段的乐音。本文仿照闪耀光栅将多级阶梯视为平面反射声栅即闪耀声栅,给出闪耀声栅声强分布,还给出相应的相邻槽间反射声波的路程差满足的约束关系。同时,根据实地考察的测量数据和相应的频谱曲线结合平面反射声栅原理对多级阶梯反射声场中形成的乐音现象予以分析,并以江苏茅山苏南抗战胜利纪念碑的“碑下放鞭炮空中响军号”和山东青岛鹤山的“招鹤回鸣”这两个现象作为实例予以阐释。The light intensity distribution formed by light waves through gratings is actually the result of single slit(groove)diffraction and multi-slot(groove)interference of grating.Observations have revealed that when a sufficient number of steps are exposed to incident noise of a certain intensity,a specific frequency band of musical sounds can be obtained in the reflected sound field.This paper,imitating a blazed grating,considers multiple steps as a plane reflective sound grating,i.e.,a blazed sound grating,and provides the sound intensity distribution of the blazed sound grating,as well as the constraint relationship satisfied by the path difference of the reflected sound waves between adjacent grooves.At the same time,based on the measured data from field investigations and the corresponding frequency spectrum curves,the phenomenon of musical sounds formed in the reflected sound field of multiple steps is analyzed in conjunction with the principle of plane reflective sound gratings.Two phenomena,the“firecrackers under the monument echoing military bugles in the air”at the Mau Shan Anti-Japanese War Victory Memorial in Jiangsu,China,and the“calling cranes to return and resonate”at Heshan in Qingdao,Shandong,China,are used as examples to illustrate this.

关 键 词：声栅原理 反射声栅 反射声场 闪耀声栅 闪耀波长 

分 类 号：O422[理学—声学]