The new database “AD-Child.Ru” includes 830 GB audio and video records of 153 children aged 4-16 years and 20 adults with atypical development. The database contains emotional speech and speech samples of children with five different types of psychiatric or neurological diagnosis: autism spectrum disorders, Down syndrome, mixed specific developmental disorders, mental retardation, cerebral palsy. Speech materials are collected in dialogue with the researcher, repetition of the words, play with the set of toys, picture description, retelling of the story, and book reading. Speech files are stored in Windows PCM format, 44100 Hz, 16 bits per sample. This database is designed to investigate the neurological and emotional state in the features of voice and speech of atypically developing children.