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The developmental changes in infants’ vocalizations over the first year of life are influenced by physical developments during that time. Physical growth of the vocal tract, brain development, and development of neurological structures responsible for vocalization are factors for the development of infants’ vocal productions. [1]
Infants start without knowing a language, yet by 10 months, babies can distinguish speech sounds and engage in babbling. Some research has shown that the earliest learning begins in utero when the fetus starts to recognize the sounds and speech patterns of its mother's voice and differentiate them from other sounds after birth. [1]
The production of spoken language involves three major levels of processing: conceptualization, formulation, and articulation. [1] [8] [9]The first is the processes of conceptualization or conceptual preparation, in which the intention to create speech links a desired concept to the particular spoken words to be expressed.
Infants first begin vocalizing by crying, followed by cooing and then vocal play. These first forms of sound production are the easiest for children to use because they contain natural, reflexive, mostly vowel sounds. Babbling usually occurs in all children acquiring language. [4]
The 2 primary phases include Non-speech-like vocalizations and Speech-like vocalizations. Non-speech-like vocalizations include a. vegetative sounds such as burping and b. fixed vocal signals like crying or laughing. Speech-like vocalizations consist of a. quasi-vowels, b. primitive articulation, c. expansion stage and d. canonical babbling.
Developmental linguistics is the study of the development of linguistic ability in an individual, particularly the acquisition of language in childhood.It involves research into the different stages in language acquisition, language retention, and language loss in both first and second languages, in addition to the area of bilingualism.
Language acquisition usually refers to first-language acquisition. It studies infants' acquisition of their native language, whether that is a spoken language or a sign language, [1] though it can also refer to bilingual first language acquisition (BFLA), referring to an infant's simultaneous acquisition of two native languages.
The production of speech is a highly complex motor task that involves approximately 100 orofacial, laryngeal, pharyngeal, and respiratory muscles. [2] [3] Precise and expeditious timing of these muscles is essential for the production of temporally complex speech sounds, which are characterized by transitions as short as 10 ms between frequency bands [4] and an average speaking rate of ...