角谱方法的原则是构造一个函数φ(τ)给出τ的峰值表明给出的来源。这　　通常实现如下。当地的一个角谱(或一致性衡量)φ(t、f、τ)计算每个时频本(t、f)的离散值τ躺在一个统一的网格可能给出的范围。这个函数是选择,这样可能会表现出大的值给出的来源是活跃的时频本。-The principle of angular spectrum-based methods is to construct a function φ(τ) of TDOA τ whose peaks indicate the TDOAs of the sources. This is commonly achieved as follows. A local angular spectrum (or coherence measure) φ(t, f, τ) is computed in each time-frequency bin (t, f) for all discrete values of τ lying on a uniform grid in the range of possible TDOAs.

This function is chosen so that it is likely to exhibit large values for the

TDOAs of the sources which are active in this time-frequency bin