【摘要】 傅立叶-贝塞尔级数方法可以将声场描述成一系列零阶贝塞尔波的加权组合,采用该方法设计超声换能器得到一种期望辐射声场的新方法,新方法根据预先给定的某些空间位置的期望声压计算出贝塞尔波的权值,然后拟合出换能器的表面声压分布,从而设计出期望的环形超声换能器.更多还原

【Abstract】 A Fourier-Bessel series method is presented to compute the linear lossless acoustic field. The method provides a new technique to model and manipulate the propagated ultrasound field by describing the field to a set of zero order Bessel beams, which have good nondiffraction feature. Based on the studying, a new method for designing ultrasonic transducer to get a desired field is presented, by which the weight values of Bessel beams can be calculated according to some desired sound pressures of fixed space position predefined. Then the distributing of sound pressure in the border could be fitted to get a desired transducer.更多还原