The acoustic transmitter composed of many flexural vibrators and arranged in an annulus is of monopole, dipole and quadrupole source functions by controlling the vibrating phase of each vibrator.

• 基本方法是由多个作弯曲振动的压电振子构成了圆弧阵辐射器，通过改变圆弧阵上压电振子的组合方式和振动相位，使该圆弧阵成为单极子源、偶极子源和四极子声源。