Space‐Time Correlations of Random Noise above a Reflecting Plane
作者:
R. F. Lambert,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1964)
卷期:
Volume 36,
issue 4
页码: 788-790
ISSN:0001-4966
年代: 1964
DOI:10.1121/1.1919085
出版商: Acoustical Society of America
数据来源: AIP
摘要:
A theoretical analysis of the space time correlations of random noise measured at two points separated a distance ξ and heighthabove a reflecting plane is formulated. The random‐incidence correlation function is discussed for noise independent of angle of incidence, omnidirectional receivers, and for a reflection coefficient Γ = ±1. Certain aspects of the resulting anisotropy of the noise field are pointed out, but attention is directed toward predicting the influence of the receiving‐point‐aspect ratio 2h/ξ on the value of the measured correlation function. It is shown that the space‐time correlation function for large‐aspect ratios approaches in the limit a form identical with that resulting for zero reflection Γ = 0. Also, the possibility of reducing the value of the spatial‐correlation function for band‐limited noise by judicious choices of ξ and 2h/ξ is pointed out.
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