Realize the way of broaden the band-width through making holes in the back of quarter-wavelength horn , and optimize the size of holes ; Calculate the position of nodal plane and make the flange here .
实现了在前盖板后端打孔的方式来拓宽频带宽度，根据数值模拟结果优选了打孔尺寸；计算了换能器的节面位置，将法兰盘设计在节面处。
the back horn