LIST OF FIGURES (Continued) 



Figure 

 No. 



Page 



III-21 Theoretical Phase Velocity (After Laird and Kendig) III-51 



III- 22 Distrii»ution of Fractional Volume for Various Bubble 



Sizes (After Fox, Curley and Larson) III- 51 



III- 23 Phase Velocity and Attenuation Through a Screen Having 



the Bubble Distribution of Figure III-22 (After Fox, 

 Curley and Larson) III- 52 



III-24 Attenuation and Phase Shift Through Single and Double 



Lattice Screens at Normal Incidence III- 54 



III-25 Reflection of Normally Incident Sound From a Single 



Lattice Screen (After MacPherson) III- 57 



III-26 Phase Velocity in Air-Water Mixtures (After Silberman) III-57 



III-27 Phase Velocity and Attenuation as Functions of Frequency 



at Various Concentrations and Bubble Sizes III- 58 



III-28 Variation of Volume Scattering Cross Sections (After 



Hersey and Backus) III -68 



III-29 Schematic Diagram of a Plane Wave Incident on a Corru- 



gated Surface III- 72 



III -30 Theoretical and Experimental Scattering Directions 



(After Leporskii) III-93 



III-31 Experimental and Theoretical Magnitudes of A^ for 



Surface A ^^^'^^ 



III-32 Experimental and Theoretical Magnitudes of A^ for 



Surface B ^^^'^^ 



III-33 Experimental and Theoretical Magnitudes of A^ for 



Surface A III'96 



III- 34 Experimental and Theoretical Magnitudes of Aq for 



Surface B I^-^^ 



Arthur Sl.lLittlcJttt. 



S-7001-0307 



