Habituation: Similar to adaptation, habituation occurs when the brain learns to ignore a repetitive or unchanging odor. This is why we may not notice the smell of our garbage can after a while, even if it is quite strong.
Masking: Certain odors can mask or block other odors, preventing them from being detected by the brain. This is why we may not notice the smell of smoke if we are also smelling something strong like coffee.
Sensory gating: The brain can also filter out certain odors based on their importance or relevance to the current situation. For example, we may not notice the smell of flowers in a field if we are focused on a conversation with a friend.
Olfactory fatigue: Prolonged exposure to a strong odor can cause olfactory fatigue, a temporary loss of the ability to smell that odor. This is why we may not be able to smell our perfume after wearing it for a long time.
