5.51 scattering differential. Amount by which the level of the scattered time-mean-square sound pressure averaged over all directions at a specified unit distance from the effective acoustic center of the scattering object exceeds the plane-wave free-field...
5.50 backscattering cross section. Of an object, 4 π steradians multiplied by the differential scattering cross section of that object, evaluated back in the direction from which the sound originates. Unit, meter squared...
5.49 scattering cross section (of an object or volume).The differential scattering cross section of the object or volume, integrated over all solid angles. Unit, meter squared (m2); Symbol...
5.48 differential scattering cross section. Ratio of the free-field scattered sound power per unit solid angle in a specified direction to the intensity of the incident propagating plane sound wave. Unit, meter squared per steradian (m2/sr) Symbol,...
5.47 acoustic scattering. Irregular reflection, refraction, or diffraction of sound in many...
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