Accession Number:

ADA222178

Title:

Inversion of Data for Near-Grazing Propagation Over Graveled Surfaces

Descriptive Note:

Corporate Author:

ILLINOIS UNIV AT CHICAGO CIRCLE DEPT OF MATHEMATICS

Personal Author(s):

Report Date:

1987-03-01

Pagination or Media Count:

5.0

Abstract:

Data obtained for low-frequency propagation over gravel-covered rigid planes are inverted by applying the procedure developed for regularly shaped protuberances. The development is based on analytical results for a point source irradiating an embossed plane, and on the uniform asymptotic form of the coherent field as a Sommerfeld type wave system in terms of the complex error function complement Q. Initial estimates of unknown parameters are obtained by working with elementary approximations of the Q integral, and then used in the complete integral for refinements and final computations. The procedure delineates the roles of interference and damping on the elementary wave components of the Q system, and the resulting graphs display the primary data trends. Reprints. jhd

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE