Besides multistage EDFA making the bandwidth reduced and noise increased, the material dispersion of optical fibers is also an important factor to affect WDM systems.

除了多级光纤放大器(EDFA)使带宽减小，噪声增大，光纤的材料色散也是对WDM系统影响的重要因素。

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To avoid dispersion of noise, tightly secured and sound-proofed operational enclosures shall be provided for machineries capable of being operated within confined space.

具备棚内操作条件的机械，均应设置封闭严密、隔音效果良好的机械操作棚，避免噪声的扩散。

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Towing ship noise is a kind of wideband interference with strong multi-path and Angle dispersion for a towed line array sonar system.

由于拖船噪声是一种具有多途角扩展的宽带相干强干扰，拖船噪声抑制是拖线阵声呐系统中的关键技术之一。

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