H. Wysor Marsh 195 
BACK SCATTERING COEFFICIENT, ( F, Feet -/°) 
to) I 2 3 4 5 6 4 8 ©) 10 
WAVE HEIGHT x FREQUENCY PARAMETER,(FH, kc -ft) 
Fig. 11.1. Back scattering vs wave height and wave height times frequency. 
ever, certain general conclusions can be drawn. The behavior of reverberation 
with changes in acoustic frequency and changes of sea condition is completely 
controlled by the expression 
Reni ext = ye (8) 
where T. = 0.0061 cos?6 sin~* 6F. 
1.0 mn 
9 iis 
H=8 
WAVE HEIGHT, (H, Feet) 
BACK SCATTERING COEFFICIENT, (F, Feet “/>) 
as 
W 
nN 
Ol -l 1.0 10 
ACOUSTIC FREQUENCY ,(f, Kilocycles Per Second) 
Fig. 11.2. Back scattering vs acoustic frequency and wave height. 
