LIST OF HGURES 



Figure 

 No. Page 



II- 1 Scattering of a Plane Wave by a Sinusoidal Surface II- 6 



II-2 Scattering by the Ocean Micro -Structure 11-10 



II-3 Low Frequency Scattering Model 11-15 



II-4 High Frequency Scattering Model for the Interference 



Range 11-15 



II-5 High Frequency Scattering Model for the Focusing Range 11-15 



II-6 Coefficient of Variation as a Function of Range 11-16 



II- 7 Fluctuation Measurements Made by ORL 11-16 



III-l Rayleigh Scattering from Small Fluid Spheres in the 



Backward Direction (After Anderson) III- 10 



III -2 The Reflectivity R as a Function of the Relative Sound 



Velocity h and Acoustic Radius Ka (After Anderson) III- 11 



III-3 The Reflectivity R as a Function of the Relative Density 



g and the Acoustic Radius Ka (After Anderson) III- 11 



III-4 The Reflectivity R as a Function of the Acoustic Radius 



Ka (After Anderson) III- 12 



III- 5 Scattering Power as a Function of the Acoustic Radius 



Ka (After Anderson) III- 13 



III-6 Directivity of Scattering for Ka ~ 1 (After Anderson) III- 13 



III- 7 Air Bubble Resonant Frequency as a Function of Bubble 



Radius III-22 



III- 8 Damping Constant for Four Typical Bubble Sizes as a 



Function of Frequency III- 24 



artl)ur JB.ILUtUJnt. 



S-7001-0307 



