Benjamin Franklin "Tex" Logan, Jr. (June 6, 1927 – April 24, 2015) was an American electrical engineer and bluegrass music fiddler.Born in Coahoma, Texas, Logan earned a B.Sc. in electrical engineering at Texas Tech University, then Texas Technological College, in Lubbock, Texas, studied for a B.Sc. in engineering at Massachusetts Institute of Technology (1946–51), and completed a M.Sc. (1956). He then moved to New Jersey where he joined Bell Labs (1956) and started his doctoral studies at Columbia University. There he earned a Ph.D. in electrical engineering with his dissertation "Properties of High-Pass Signals" (1965). Logan joined the communication theory department at Bell Labs (1956) where he and others demonstrated the use of computer simulation in the study of reverberation in digi