Gallagher 



Z(«10'l 

 50 52 54 56 58 60 50 52 



54 56 58 60 65 64 



^ 



^ 



.b 



P 



NAVOCEANO DIRECT 



IMPEDANCE xlo' IB/ft' -SEC 



TOTO CORE NO. 6 



---- INFERRED CURVE (NO DATA AVAILABLE! 



SUTTON 



Fig. 7 

 Vertical Acoustic Impedance Profiles- 

 Core No. 6 -TOTO 



20 30 40 50 60 70 



ANGLE OF INCIDENCE (DEGREES) 



Fig. 8 



Reflection Coefficients versus Incident 



Angles- Core No. 6- TOTO 



Table 6 



MEASURED AND SUTTON DERIVED SOUND VELOCITIES AND CORRESPONDING 

 ACOUSTIC IMPEDANCE DATA — CORE NO. 6 — TOTO 



of the differences in the reflection coefficient curves between the two methods 

 for cores 5 and 6 does not necessarily reflect the respective ranges of sound 

 velocity differences in these cores. The differences between the reflection coef- 

 ficients computed from the measured and Sutton derived data for core no. 5, where 

 the sound velocity differences are very small, are similar to those differences in 



98 



