On the significance of reflection coefficients produced by active surfaces bounding one-dimensional sound fields

2003 ◽  
Vol 113 (3) ◽  
pp. 1475-1482 ◽  
Author(s):  
Timothy W. Leishman ◽  
Jiri Tichy
1973 ◽  
Vol 15 (5) ◽  
pp. 321-325 ◽  
Author(s):  
M. A. Ali ◽  
E. W. Reed ◽  
K. F. Gill

A correlation technique using pseudo-random binary-sequence pressure-pulse testing is used to measure reflection coefficients of sharp edged orifices at the end of a duct. Within the range of the incident pressure-wave amplitude investigated in this paper it is believed that no other experimental means has yet been devised. A simple formula is derived from one-dimensional flow theory which gives values showing close agreement with the experimental results. End conditions for non-reflection are established to create an analogy to the hypothetical ‘infinite pipe’.


Nano Letters ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 120-126 ◽  
Author(s):  
David T. Schoen ◽  
Ashwin C. Atre ◽  
Aitzol García-Etxarri ◽  
Jennifer A. Dionne ◽  
Mark L. Brongersma

Geophysics ◽  
1985 ◽  
Vol 50 (3) ◽  
pp. 425-433 ◽  
Author(s):  
Andrew E. Yagle ◽  
Bernard C. Levy

A fast algorithm for recovering profiles of density and Lamé parameters as functions of depth for the inverse seismic problem in an elastic medium is obtained. The medium is probed with planar impulsive P- and SV-waves at oblique incidence, and the medium velocity components are measured at the surface. The interconversion of P- and SV-waves defines reflection coefficients from which the medium parameter profiles are obtained recursively. The algorithm works on a layer‐stripping principle, and it is specified in both differential and recursive forms. A physical interpretation of this procedure is given in terms of a lattice filter, where the first reflections of the downgoing waves in each layer yield the various reflection coefficients for that layer. A computer run of the algorithm on the synthetic impulsive plane‐wave responses of a twenty‐layer medium shows that the algorithm works satisfactorily.


Author(s):  
Erdogan S. Suhubi ◽  
Alan Jeffrey

SYNOPSISThis paper investigates the one-dimensional propagation of weak discontinuities, that is acceleration waves, in a homogeneous and isotropic half-space composed of an arbitrary number of non-linearly hyperelastic layers. The transmission and reflection coefficients are evaluated in terms of the initial condition at the boundary, and the steepening of the waves to form a shock is discussed. The results are specialised to the case of periodic layering.


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