Israeli startup Moodify aims to solve odor issues in vehicles with fragrances that do not cover up awful smells but instead change your perception of them. Just as “white noise” can eliminate unwanted sounds, Moodify’s “white scent” counters bad odors such as rotten bananas or cigarettes.
http://nocamels.com/2019/07/moodify-smell-scent-drivers-alert-mood/