Threshold sensitivity refers to the minimum level of stimulus required for a person to detect a change in their environment. This concept is often used in psychology and sensory studies to understand how individuals perceive different stimuli, such as light, sound, or touch. For example, a person may only notice a faint sound when it reaches a certain volume, which indicates their threshold for auditory sensitivity. In practical applications, threshold sensitivity can vary among individuals and can be influenced by factors like age, health, and experience. Understanding these thresholds helps in fields like audiology, where professionals assess hearing capabilities, or in psychophysics, which studies the relationship between stimuli and perception.