Analysis for Acoustic Field of Wide-band Linear Phased Array

A simple algorithm of impulse response for rectangular piston element is discussed. Impulse response of linear phased array is obtained by summing impulse response of a rectangular piston element with different delay time. Output response of linear wideband array is equal to convolution of impulse response functions with wide-band pulse exciting signal. Acoustic field distribution and impulse response of three kinds transducers are compared. The results can be used to optimize the parameters of the linear phased array transducer of ultrasound imaging in nondestructive test (NDT).