Directional Response of a Vector Intensity Hydrophone Array
Keywords:
acoustic arrays, acoustic field, hydrophones, underwater sound, directional response, vector intensity hydrophone array, NORDCO 3-D hydrophone array, sound intensity vector, real time response, sound intensity field pointAbstract
This paper describes the test results of a procedure to measure the directional response of a vector intensity hydrophone array. The NORDCO 3-D hydrophone array was designed to simultaneously capture the three components of a sound intensity vector. The phase matched array requires accurate positioning of the receiver elements to achieve a real time response. To calculate the directional response of the array, the x, y and z components of a sound intensity field point produced by a stationary source were measured while rotating the array about its z axis. The resulting sound intensity curves showed the expected cosine patterns with the minima of the x and y components spaced precisely 90° apart.
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