Invalid pump operation is often disturbance caused by sound level measurement and indicator diagram for diagnosis.
无效的泵运转常是气干扰造成的，可通过声波液面测量和示功图进行诊断。
2
The method can improve the measurement precision and lay a sound basis for its application on the measurement of complex surfaces.
该方法对测量精度的提高较大，为其在复杂型面测量领域的应用打下良好基础。
3
In this article, a simple and practical method of evaluating sound isolation and leak of cabs is introduced, and an example of cab sound isolation and leak measurement using SPLM has been given.