互功率谱求时延，并且统计了时延值和这个时间点的最大功率-Crosspower seek latency, and latency statistics and the time value of the maximum power point

频率响应函数简称，频响函数。为互功率谱函数除以自功率谱函数得到的商-frequency response function. means the mutual power spectrum function, divided by the power spectrum function