difference limen difference test

例句：

1. 1.The difference limen between two stimuli is the smallest amount of change that can be detected by the human senses.
   两种刺激之间的差异阈限是人的感觉能够检测到的最小变化量。
2. 2. The researchers found that the difference limen for color perception was significantly reduced in people with color blindness.
   研究人员发现，色盲的人在颜色感知的差异阈限上显著降低。
3. 3. The difference limen for hearing sensitivity was measured to determine how much sound pressure is required to detect aparticular frequency.
   测量了听觉敏感度的差异阈限，以确定需要多少声压来检测特定频率的声音。