Volume of returning echo and brightness (intensity)
Direct
f and SR
Direct
WL and SW Penetration
Direct
Amplitude and compression of waves
Direct
BM and C
Direct
C and stiffness
Direct
Time and depth of organ
Direct
f and WL
Inverse
WL and SR
Inverse
f and SW penentration
Inverse
Area evaluated and beam intensity
Inverse
Density and C
Inverse
K and C
Inverse
K and BM
Inverse