Communication Sciences and Disorders 4411A/B Lecture 9: LEC9 NOTES
6 Nov 2018
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Lecture 9 speech sound disorders in children. Speech sounds: phoneme, spoken sound of a language, changing the phoneme can contribute to changing meaning, but phonemes alone have no meaning, allophones (variations in the same phoneme) International phonetic alphabet (ipa: english alphabet = 26 letters. Ipa = the system for representing sounds of speech. 42 ipa symbols (18 vowels and 24 consonants) Place of articulation: bilabial lips, glottal/laryngeal constriction at glottal opening. Sound is completely constricted and stopped before being released. Sound is partially constricted, which sets up turbulence as air passes through. Sound is modulated by combination of complete closure following by turbulent rush of air through constricted opening. Sound is modulated by air passing through nasal cavity instead of oral cavity. Tongue is shaped in various ways to either channel air blown through center or across and along sides. One articulator approaches another but does not make vocal tract so narrow that turbulent airstream results.
