noun
stimulus threshold; stimulus limen
Technical term in psychology and physiology; the minimum intensity of a stimulus needed to produce a sensation or response.
See also: 閾 (いき)
刺激閾以下の光は、人間の目には見えない。
Light below the stimulus threshold is invisible to the human eye.
この実験では、音の刺激閾を
In this experiment, we measure the stimulus threshold for sound.
閾値 is a more common term for 'threshold value' in various fields; 刺激閾 is more specific to sensory stimuli.
Compound of 刺激 (stimulus) and 閾 (threshold). The reading いき for 閾 is a standard on'yomi.