The result is accord with geological sample and sediment chart, so this method can be applied on sediment classification of narrow-band pulse echosound signal.
分析结果与地质采样结果及海图均吻合，说明本文提出的方法应用于窄带脉冲信号的海底底质分类是适用的。
2
By hanging panels of sound absorbing felt on the walls, Sabine reduced the echo enough to make the hall usable.
通过在墙上悬挂吸音板，Sabine 减少了足够的回声，使大厅可用。
3
Usually, as they swim, they make clicking noises, and the resulting sound waves are reflected in an echo and travel back to them.