Acoustic Scattering 1 Acoustic backscatter 1 Acoustic field measurement 1 Acoustic impedance 1 Acoustic wave backscattering Acoustic wave scattering 1 Crude oil 1 Drops 1 Fate and transport 1 Frequency dependent 1 Heavy oil production 1 Hydrocarbon droplets 1 Marine environment 1 Marine pollution 1 Oil spills 1 Petroleum transportation 1 Planktonic organisms 1 Spheres 1 Spherical droplets 1