Measuring the Acoustic Properties of Underwater Coating Material under Pressure-Acoustic Impedance Method

A method to measure the acoustic properties of underwater acoustic coating material under pressure based on acoustic impedance matrix is setup. Acoustic impedance matrix is measured to evaluate the absorption and transmission loss of underwater material. The test apparatus are well designed, especially for the tube, driver, backing mass and hydrophones. Isotropic material samples are tested to verify the test apparatus. Impedance matrix of acoustic coating material samples is measured to evaluate the absorption and transmission loss of samples, compared with theoretical results, and hence the acoustic impedance method is verified.