GAIN OF A THREE-DIMENSIONAL ARRAY IN A DIRECTIONAL NOISE FIELD.
NAVY UNDERWATER SOUND LAB NEW LONDON CONN
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The array gain of a three-dimensional 32-element array is obtained for the case of directional noise. For a perfectly coherent signal, the array is given in terms of the spatial correlation of noise. A brief review of the spatial correlation equation corresponding to directional noise is given. Experimental verification of this model is cited. The array gains are compared for the isotropic and directional noise cases for plus or minus 13 degree steering from the horizontal direction. The plus or minus degree beam for the isotropic noise case is close to the 13 degree beam of the directional noise case but is very different from the -13 degree beam of the directional noise case, the maximum difference being about 10 db. The maximum gain for the latter case is 27 db. Author
- Acoustic Detection and Detectors