人耳对信号频率瞬时变化的听觉响应研究

从探讨人耳在噪声背景中听测具有复杂时间－频率结构的主动声呐信号的模型出发，研究了人耳对信号频率发生短时间变化的感觉灵敏性问题。根据在８５０～１１３０Ｈｚ频段内的测量结果，得出了人耳听觉对频率变化响应的模糊区域由τ△Ｆ＝１～２决定。这里τ和△Ｆ分别是指信号频率变化的时间间隔及变化的差值。当τｔ△Ｆ≤１时，人耳感觉不到频率的瞬变，而当，τ△Ｆ≥２时则能十分清楚地分辨。

A study of the auditory response to transitions between signal frequencies

For the study of detecting sonar signals with complex time-frequency composition under noise-background by human auditory system, the problem of auditory response to transitions between signal frequencies has been examined through a number of tests. According to the results of measurement within a frequency .region of 850-1130 Hz, an equation (τ△F=1-2) to define the ambiguity region of responding to frequency transitions by human auditory system is found, where △F and τ are the difference and duration of the transition between two frequencies respectiyely. when τ△≤1, the human auditory system hardly can sense transitions between frequencies, however very clearly sense when τ△F≥2.