Measuring Reflection Coefficient of Underwater Acoustic Materials with the Vector Hydrophone

Reflection coefficient of underwater materials can be calculate by measuring impedance above the sample. some techniques which measure reflection coefficient are based on the sound pressure. This paper introduces a method for measuring reflection coefficient with vector hydrophone which can measure the instantaneous sound pressure and sound particle velocity. Then the reflection coefficient can be calculated by impedance which is acquired by sound pressure and particle velocity. Some simulations and experiments in this paper show that the method with vector hydrophone have a good performance in measuring reflection coefficient, the minimum error is 0.006. It prove that the method is effective both in vertical and oblique incidence, handy in practice.