Floyd Dunn (April 14, 1924 – January 24, 2015) was an American electrical engineer who made contributions to all aspects of the interaction of ultrasound and biological media. Dr. Dunn was a member of Scientific Committee 66 of the National Council on Radiation Protection and Measurements as well as many FDA, NIH, AIUM, and ASA committees. He collaborated with scientists in the UK, Japan, China and Post-Soviet states.