Accession Number : AD0686663

Title :   A PDP-8 FORTRAN PROGRAM FOR REDUCTION OF ACOUSTIC IMPEDANCE DATA.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Lastinger,James L. ; Sabin,Gerald A.

Report Date : 28 MAR 1969

Pagination or Media Count : 13

Abstract : A FORTRAN program was developed to compute the propagation constants of a sample of material from measured values of the complex reflection coefficient, the sample density, and the sample thickness. Because the equations relating the reflection coefficient to the propagation constants are transcendental and cannot be solved algebraically for the attenuation and sound speed, the technique is to assume a pair of values and use the method of successive approximations. The program and its present limitations are discussed, and sample computations are presented. (Author)

Descriptors :   (*ACOUSTIC IMPEDANCE, COMPUTER PROGRAMS), REFLECTION, DENSITY, ATTENUATION, VELOCITY, TRANSCENDENTAL FUNCTIONS, ITERATIONS

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE