Long latency auditory evoked potentials and object-related negativity based on harmonicity in hearing-impaired children

•LLAEPs and ORN responses, a neural metric of concurrent sound segregation compared between NHC and HIC.•The analysis of scalp-recorded LLAEPs indicated that tuned stimuli elicited lower N2 amplitudes in HIC than control.•ORN2% latency and less presence of ORN waves obtained in all conditions in HIC than NHC.•HIC have difficulty parsing concurrent sound object based on harmonicity cues.