An absolute threshold is the smallest intensity of the stimulus that must be present for it to be detected. (Aazh & Moore, 2007).
Our senses are extremely responsive to stimuli. For example, the sense of the touch is so sensitive that we can feel a bee’s wing falling on our cheeks when it is dropped from a distance of 1 centimeter.
Absolute threshold is the point at which a stimulus can just be picked up by the sense organs.