A new kind of array model was designed： 90 small rings were distributed at five concentric circumferences of different radius, where each small ring vibrated with parabolic velocity weighting. Characteristic variation of sound field was studied with parameters of the array size, spacing and so on. The results show that this array has an extremely intensive directivity and an ability of suppressing side-slobs. A best distribution of sound field can be obtained when the array combination and parameters are adjusted according to practical situ...
