One projector of the great direction

Use the FEM method to compute the direction of the projector with the baffleplate.we utilize the battleplate to achieve the great direction for the projector.In this paper,the working frequency of the projector is 30kHz,its direction is 79.8°,which agree with the theory computation.Transmit voltage response for the projector with the baffleplate increase more 6dBs than for the one without the baffleplate.