Preliminary investigation of an electrical network model for ultrasonic scattering
James E. Maisel, Cleveland State University, Lewis Research Center, United States. National Aeronautics and Space Administration. Scientific and Technical Information Office
National Aeronautics and Space Administration, Scientific and Technical Information Office, 1984 - Medical - 42 pages
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15 microns acoustic attenuation acoustic impedance ACOUSTIC WAVES Propagation amplitude angular frequency assumed attenuation depends attenuation profile attenuation versus frequency average separation behavior of attenuation bulk modulus characteristic impedance Cleveland State University correlation spacing cross sectional area cylinder density and bulk determines the attenuation dimension distance due to scattering Electrical Network Model electrical transmission line Equation 1-1 Equation 1-7-a Equation 4-9 ergodic Fourier transform frequency dependent function of frequency host medium isotropic low-loss mass density mean square deviation Model for Ultrasonic normalized mean square Np(r plane wave propagation constant proportional quency random process Rayleigh Results indicate scattered pressure wave scattered wave scattering amplitude scattering angle scattering cross section scattering density scattering site density second term shift per unit shown in Figure shunt conductance solid spatial correlation function spatial ensemble specimen sphere transmission line model unit length value of attenuation variance velocity of propagation wave propagating wavelength Young's modulus