Many aspects of psychogenic deafness as encountered clinically in association with psychopathology have already been demonstrated in deafness produced in normal persons by direct suggestion under hypnosis (Erickson, 1938; Pattie, 1950). Such work to date has dealt only with deafness extending over the whole aural spectrum (total deafness). We have reported, in a preliminary communication, on the production of frequency selective deafness in this way (Black and Wigan, 1960), and we have now carried out further interpretation of our data and have performed a number of additional experiments.