Hydrophone for Determining Direction of Underwater Sound

The invention is directed to an improved acoustic sensor system for determining the direction of underwater sound signals relative to a user is disclosed. The sensor system includes first and second sensing means for sensing incoming acoustic energy and for providing first and second acoustic energy signals in response thereto separation means for separating the first and second sensing means a distance S ECsub wCsub A where E is substantially equal to the separation distance between the users ears, Csub w is the speed of sound in water, and Csub A is the speed of sound in air detector means, operatively connected with the first and second sensing means, for providing first and second output signals in response to the first and second acoustic energy signals and audio means, operatively connected with the detector means, for providing an audio output to the user in response to the first and second output signals.