surface acoustic wave frequency discriminator

例句：

1. 1.The surface acoustic wave frequency discriminator is used to detect the presence of a foreign object in the audio signal.
   表面声波频率鉴别器用于检测音频信号中是否存在外来物体。
2. 2. The engineer developed a new surface acoustic wave frequency discriminator that can accurately identify different types of materials.
   工程师开发了一种新型的表面声波频率鉴别器，能够准确地识别不同类型的材料。
3. 3. The surface acoustic wave frequency discriminator was used to improve the accuracy of the detection system fordetecting faults in electrical circuits.
   表面声波频率鉴别器被用来提高检测系统在检测电路故障时的准确性。