Sensory Adaptation

Sensory adaptation is the diminishing response of a sensory system to a constant or repeated stimulus over time. Classic examples include no longer noticing a steady smell, becoming accustomed to ambient noise, or losing awareness of clothing pressed against the skin. In multisensory and assistive technology design, adaptation is a critical constraint: olfactory displays must pulse rather than emit continuously, vibrotactile alerts can fade into the background, and persistent audio earcons can be tuned out. Designers manage adaptation through intermittent delivery, varying stimulus parameters, and allowing rest intervals so the sensory channel recovers before the next cue.