Figure 3
(a) Magnitude estimates as a function of electric current for right mastoid and forehead plate electrodes in an individual subject (blue = auditory sensation; black = somatic sensation). (b) Same as (a) except for right ear canal tiptrode and forehead plate electrode. (c) Frequency-pitch function from 14 normal-hearing subjects. The solid diagonal line represents 1:1 matches between acoustic frequency (y-axis) and electric frequency (x-axis). The dashed line represents 2:1 matches, with acoustic frequency doubling electric frequency. (d) Frequency-pitch function in 2 unilaterally deafened subjects (dashed lines and circles for one subject and solid squares for the other). The y-axis represents sound frequencies in the hearing ear matched to the frequency of electric stimulation delivered to the deaf ear (x-axis). Dashed lines = subject U1, Solid lines = subject U2 (See Subjects in Methods).
