Calculate the density contrast (\(\rho\)) of a scattering boundary
Arguments
- medium
Dataframe object containing density (\(kgm^{-3}\)) and
sound speed (\(ms^{-1}\)) values for the external medium.
- target
Dataframe object containing density (\(kgm^{-3}\)) and
sound speed (\(ms^{-1}\)) values for the target boundary.
Value
Density contrast, defined as
\((\rho_{target} - \rho_{medium})/\rho_{target}\).
