The recognition of noised words by 4-7 years old children with normal speech (NS) and with speech and language impairments (SLI) was studied. It was shown that children in both groups have more mistakes and more long reaction time than adults. Moreover, SLI children had worse performance than NS. In both groups older ( 5 years) children recognized noised words better than the younger (< 5 years) ones. NS children perceived the words which were acquired at the early age with less mistakes than the words acquired at the older age. The relations between the development of speech perception, noise resistance and speech production are discussed.