Orvis C. Irwin

Infant Speech: Development of Vowel Sounds

Infant speech; consonantal sounds according to place of articulation.

Infant speech; the effect of family occupational status and of age on use of sound types.

Infant speech; the effect of family occupational status and of age on sound frequency.

Infant Speech: Consonant Sounds According To Manner Of Articulation

Infant speech; vowel and consonant frequency.

Speech Development In The Young Child: 2. Some Factors Related To The Speech Development Of The Infant and Young Child

Infant Speech Vowel And Consonant Types

Phonetic Equipment Of Spastic And Athetoid Children

Speech Sound Elements During the First Year of Life: A Review of the Literature