基于TDE的双步声源定位就是先 估计出信号在不同阵元处的到达时间差（Time delay ofarrival，TDOA），进而再 利用这些参数通过双曲线方程进行定位。
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在声波的“头部”和“尾端”到达之间有30分钟的时间差。
There was a 30-minute time difference between the arrival of the "bow" and "stern" waves.
提出了一种利用平面解三角，并结合辐射源信号到达方向和脉冲到达时间差对运动辐射源进行单站无源定位的算法。
An algorithm used trigonometry to passively locating a moving emitter with direction of arrival (DOA) and time difference of arrival (TDOA) of the emitter signal is given.
为了适当地用这种方法重建信号，我们必须精确地知道信号的最高频部分和最低频部分到达的时间差。
In order to properly reconstruct a signal in this manner, we would have to know the exact time-lag between the highest frequency portion and the lowest frequency portion of the signal.
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