The importance that early auditory stimulation has on the infant's plastic brain with regard to optimal listening and language development is well-known. 1,2 During the first year of life, infants with normal hearing start to pay attention to the acoustic features of the speech they are surrounded by. They also develop phonology and acquire the statistical patterns that are important for word segmentation. 3 Children with congenital hearing loss are now identified earlier because of universal hearing screening programmes for newborn infants. 4 The recommended practice for newborn infants with hearing

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The ability to detect ITD was present only when the cochlear implant stimulation had FS. The LF sound was more difficult to localize than the BB sound and ITD ability of FS strategies did not affect the localization ability of either sound. A low ILD seems necessary to improve the localization ability.