Objective:To study the effect of binaural bi-modal fitting(one cochlear implant and a contralateral hearing aid)on speech recognition of cochlear implant recipients with low frequency electrodes incompletely implanted.Method:A total of 15 cochlear implant(CI)users who have low residual hearing(250 Hz 45-90 dBHL,500Hz 75-100dBHL)of their non surgery ears.We closed the top three electrodes to simulate the state of lowfrequency electrodes incompletely implanted by fitting software.1The same tester received twi...