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
黄绍书,吴次南
摘要(Abstract)：
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。
关键词(KeyWords)： 声栅原理;反射声栅;反射声场;闪耀声栅;闪耀波长
基金项目(Foundation):
作者(Author): 黄绍书,吴次南
参考文献(References)：
- [1] 林建恒，高大治，衣雪娟，等.“招鹤回鸣”:布拉格共振声学景观[J].声学技术，2016(2):87-90.LIN J H,GAO D Z,YI X J,et al.“Recalling the Crane”:Prague resonant acoustic landscape[J].Acoustic Technology,2016(2):87-90.(in Chinese)
- [2] 张洁，毛东兴.苏南抗战胜利纪念碑军号声成因分析[J].声频工程，2007(5):13-15,19.ZHANG J,MAO D X.Analysis of the cause of the bugle sound at the Monument to Victory in the Anti-Japanese War in Southern Jiangsu[J].Audio Engineering,2007(5):13-15,19.(in Chinese)
- [3] 严立中，李志军.茅山新四军纪念碑号声揭密[J].电声技术，2006(11):7,8,16.YAN L Z,LI Z J.The horn of the Maoshan new fourth army monument was revealed[J].Electroacoustic Technology,2006(11):7,8,16.(in Chinese)
- [4] 李志军，严立中，王林.再谈茅山革命纪念碑军号声成因[J].声学技术，2007(6):1201-1204.LI Z J,YAN L Z,WANG L.Talking about the cause of the bugle sound of Maoshan revolutionary monument[J].Acoustic Technology,2007(6):1201-1204.(in Chinese)
- [5] NICO F.Dclercq,JORIS Degrieck.A theoretical study of special acoustic effects caused by the staircase of the EI Pyramid at theMaya ruins of Chichen-Itza in Mexico[J].Journal of the Acoustical Society of America,2004,116(6):3328=3335.
- [6] NICO F Declercq,Cindy S A Dekeyser.Acoustic diffractioneffectsat the Hellenistic amphitheater of Epidaurus:Seat rows responsiblefor the marvelous acoustics[J].Journal of the Acoustical Society of America,2007,121(4):2011-2022.
- [7] BIRKL G,GATZKE M,DEUTSCH I H,et al.Bragg scattering from atoms in optical Lattices[J].Phys.Rev.Lett.,1995,75(15):2823-2826.
- [8] WEIDEMULLER M.Bragg diffraction in an atomic lattice bound by light[J].Physical Review Letters,1996,75(25):4583-4586.
- [9] In-Ho Bae.Electuomagnetically induced Bragg reflection with a stationary coupling field in a buffer rubidium vapor cell[J].Applied Optics,2008,47(27):4849-4855.
- [10] Donvalkar,Prathamesh S.Frequency translation via four-wave mixing Bragg scattering in Rb filled photonic bandgap fibers[J].Optics Letters,2014,39(6):1557-1560.
- [11] 赵凯华.光学[M].北京：高等教育出版社，2004(1):195-220.ZHAO K H.Optics[M].Beijing:Higher Education Press,2004(1):195-220.(in Chinese)