Abstract
In the case of an underwater acoustics antenna, the transducer is usually mounted as follows: One face of the sensor is leaned against a structure withstanding the pressure, and the other one is in contact with water. Any structure vibration is transmitted to the sensor and generates noise that alters the receiving performances. It will be shown that, in the case of an asymmetrical mounted transducer, the sensor sensitivities depend on the excitation direction. This feature is applied in inserting a pressure sensor between the transducer support and the structure. The response of this system is analyzed and shows that the S/N ratio can be significantly increased by subtracting noise. Trials in an acoustic water tank are described and results on real antenna are given.
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