anechoic room

例句：

1. 1.The room was anechoic, making it difficult to hear anything.
   房间是无反射的，使得很难听到任何东西。
2. 2.The engineer used anechoic chambers to test the new device.
   工程师使用无反射室来测试新设备。
3. 3. The scientist conducted experiments in anechoic chambers to study sound waves.
   科学家在无反射室中进行实验，以研究声波。