Age babies Perceive and Produce Specch Sounds

Infants up to 10–12 months can distinguish not only native sounds but also nonnative contrasts. Older children and adults lose the ability to discriminate some nonnative contrasts.Thus, it seems that exposure to one’s native language causes the perceptual system to be restructured. The restructuring reflects the system of contrasts in the native language.

Infants usually produce their first word around 12 –14 months of age. First words are simple in structure and contain the same sounds that were used in late babbling. The lexical items they produce are probably stored as whole words rather than as individual segments that get put together online when uttering them. This is suggested by the fact that infants at this age may produce the same sounds differently in different words.

If you are very interesting in to know more about this speech sounds, you can see more in this video. Als you can read more here
https://en.wikipedia.org/wiki/Phonological_development