第二 种传输损害是相位延迟畸变(Delay Distortion), 它是指数字信号的各种频率成分 到达接收端的延迟不一样，导致接收信号时产生码间干扰，增加误码率。
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envelop delay distortion 包络延时失真 ; 包线延迟畸变
Envelope Delay Distortion 波封延迟畸变 ; 包封延迟失真 ; 波封延迟失真 ; 包线延迟失真
envelope delay distortion meter 包络延迟失真测量仪
delay distortion measuring equipment 延迟失真测量装置
wave delay distortion 波导时延失真
time delay distortion [电子] 延时失真 ; 时间延迟失真
linear delay distortion 线性延迟失真
group delay distortion 群延时失真
This paper defines phase and group delay distortion of audio system based on point view of linear system analysis and the physical meanings of group delay is discussed.
本文从线性系统分析的角度定义了音响系统的相位和群延迟失真，并讨论了所定义的群延迟物理意义。
A periodic or continuous check of such channel characteristics as delay distortion, frequency response, and noise in an effort to reduce or eliminate the causes of errors.
周期性地或连续地检验通道的某些性能，如延迟失真、频率响应及噪声等，以便消除或减少引起错误的原因。
Its benefits is to reduce the phase delay, thus reducing the phase distortion speaker, improved transient response of the speaker.
其好处是减少了的相位延时，从而减低了扬声器的相位失真，改良了扬声器的瞬态响应。
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