By Mitchell Batavia, PT, Ph.D.
Mitchell Batavia PT, Ph.D., is an associate professor of physical therapy at New York University and a person with a hearing impairment. In addition to cartoons and flash fiction, he has published healthcare textbooks with Elsevier and Butterworth-Heinemann.


A simple, universal visual warning system (like a red, yellow, or green noise-level indicator at a concert venue, racetrack, or theme park) instantly conveys danger, warning, or safety to people of all ages. Combined with access to basic foam earplugs and insertion instructions, a simple prompt can transform behavior.