人耳对复杂信号听测问题的研究

Research on auditory detections of complex sound signals in noise

在相同信号形式和噪声背景条件下，通过直接对比人耳的听测性能和两种典型信号检测器的检测性能，在总的趋势上得出：人耳对频率变化规律确知的复杂声信号的听测模型接近于音调相关检测器；对频率变化规律未知的复杂声信号的听测模型接近于能量检测。此外，本文给出了在噪声背景下人耳听测三种频率变化规律的复杂声信号（单跳频、线性跳频、随机跳频）的灵敏度定量差别及人耳听测灵敏度和信号长度之间的定量关系。

Through direct comparisons of detection performances of human auditory system with two typical signal detectors, it has been found that, the auditory detection of sound signals with completely known modes of frequency variation in noise can be described as a tone-correlator, however, it would act as an energy detector for sound signals with unknown modes of frequency variation. In addition, quantitative differences of auditory sensitivities to three typical signals (i.e. single FS, linear FS and random FS) and the relation between auditory sensitivity and signal duration have been derived through experimental studies.