Phonetics and Phonology: Distinctive Features and Vowel Sounds
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Distinctive Feature Theory
Distinctive Feature Theory challenges Phoneme Theory (PT) by focusing on the features that compose phonemes, rather than the phonemes themselves. This approach questions the validity of the phoneme concept, arguing that speech is not simply a series of discrete sounds.
Natural Class: A set of sounds sharing phonetic features, affected by the same environment, and having the same effect on surrounding sounds.
Major Class Features
- Vowels: [+SYLLABIC], [+SONORANT], [-CONSONANTAL] - form the syllable nucleus.
- Glides: [-SYLLABIC], [+SONORANT], [-CONSONANTAL].
- Sonorant Consonants (nasals and liquids): [+/-SYLLABIC], [+SONORANT], [+CONSONANTAL].
- Obstruents: [-SYLLABIC], [-SONORANT], [+CONSONANTAL].
Consonant Features
- Voice: [+/-VOICE]