The quantitative measurement of acoustic properties is indispensable for many applications. The realization of devices for the evaluation of acoustic properties with higher accuracy and lower error is of great importance. Moreover, the ability to obtain the high-frequency acoustic characteristics of materials is also highly desirable. In this research, the pulse echo method is applied to measure a material’s acoustic parameters, using a miniature transducer with a center frequency of 42.9 MHz. For this method, only one transducer is needed, and the measurement system is simple. Acoustic parameter calculation methods for three types of materials are studied, and the corresponding experiments are conducted. The experimental results show that the sound velocity of water is 1508.8 m s −1 , and its attenuation coefficient is 0.981 dB mm −1 ; the results for liquid paraffin give results of 1386.8 m s −1 and 2.35 dB mm −1 , respectively. With refere...

中文翻译：

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高频换能器的脉冲回波声学特性评估方法

声学特性的定量测量对于许多应用都是必不可少的。实现用于以更高的精度和更低的误差评估声学特性的设备非常重要。此外，也非常需要获得材料的高频声学特性的能力。在这项研究中，脉冲回波法被应用到使用中心频率为42.9 MHz的微型传感器来测量材料的声学参数。对于这种方法，只需要一个换能器，并且测量系统很简单。研究了三种材料的声学参数计算方法，并进行了相应的实验。实验结果表明，水的声速为1508.8 ms -1，衰减系数为0.981 dB mm -1; 液体石蜡的结果分别为1386.8 ms -1和2.35 dB mm -1。与裁判...