3 sentences

1. 声波发射器被摧毁了。

   shēng​bō fā​shè​qì bèi cuī​huǐ le.

   The sonic emitter has been destroyed.

   Source: OpenSubtitles

2. 声波在水中传播的速度比在空气中快。

   shēng​bō zài shuǐ zhōng chuán​bō de sù​dù bǐ zài kōng​qì zhōng kuài.

   Sound waves travel faster in water than in air.

   Source: Dong Chinese Dictionary

3. 示波器上显示出一段极其规律的声波图像。

   shì bō qì shàng xiǎn​shì chū yī duàn jí​qí guī​lǜ de shēng​bō tú​xiàng.

   The oscilloscope showed an extremely regular sound wave pattern.

   Source: Dong Chinese Dictionary