本文基于单片机技术,研制了频率范围为100kHz—10MHz的超声衰减、声速综合测试仪。文中声衰减系数的测量是采用两个不同反射脉冲回波序列包络的面积之比——即“面积比值法”来求得;声速的测量是在定距离下,用时差法测出声传播时间,再换算成声速值。 In this paper, based on single-chip technology, developed a frequency range of 100kHz-10MHz ultrasonic attenuation, sound velocity Tester. The acoustic attenuation coefficient is measured by the ratio of the areas of two different envelopes of echo envelopes - the area ratio method. The velocity of sound is measured at a constant distance using the time difference method to measure the acoustic propagation Time, then converted into sound velocity value.