In 1947, he became a research fellow at Harvard University's Psycho-Acoustic Laboratory. He joined the MIT faculty in 1951 as an associate professor of communications biophysics in the Department of Electrical Engineering, was tenured in 1957, chair of the faculty from 1967 to 1969, and named Institute Professor in 1975.
In 1947, he became a research associate at Harvard University's Psycho-Acoustic Laboratory. He joined the MIT faculty in 1951 as an assistant professor of communication biophysics in the Department of Electrical Engineering, was tenured in 1957, served as department chair from 1967 to 1969, and was named Institute Professor in 1975.