echo amplitude

例句：

1. 1. The sound of the waves hitting the shore is a good indicator of the ocean's echo amplitude.
   海浪拍打岸边的声音是衡量海洋回声振幅的一个好指标。
2. 2.In the field of acoustics, understanding the echo amplitude is crucial for designing effective sound systems.
   在声学领域，了解回声振幅对于设计有效的声系统至关重要。
3. 3.The scientist used a special device to measure the echo amplitude of the earthquake wave.
   这位科学家使用一种特殊的设备来测量地震波的回声振幅。