CSD 232 • Descriptive Phonetics Distinctive Features
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Transcript of CSD 232 • Descriptive Phonetics Distinctive Features
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1CSD 232 • Fall 2009 • Distinctive Features
CSD 232 • Descriptive Phonetics
Distinctive Features
Eulenberg/Wood
Fall 2009
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2CSD 232 • Fall 2009 • Distinctive Features
Phonological Analysis• A Phonological Analysis consists of the
following elements:– List of the phonemes of a language– Classification system for categorizing the
phonemes– Phonotactics - positional and sequential
occurrences of phonemes within a language– List of the allophonic variations for each of the
phonemes
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3CSD 232 • Fall 2009 • Distinctive Features
Alternative Classification SystemsFor Describing and Categorizing Phonemes
• Classical phonetic features of place and manner, and voicing
• Distinctive Features
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4CSD 232 • Fall 2009 • Distinctive Features
Classical Phonetic Features
/p / specified using articulatory descriptors:
/ p / =
voiceless bilabial stop
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5CSD 232 • Fall 2009 • Distinctive Features
Distinctive Features /p / described as a bundle of features
•[-Vocalic]
•[+Consonantal]
•[-Sonorant]
•[-Coronal]
•[+Anterior]
•[-High]
•[- Low]
•[- Back]
•[- Rounded]
•[- Distributed]
•[- Nasal]
•[- Lateral]
•[- Continuant]
•[+Tense]
•[- Voiced]
•[-Strident]
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6CSD 232 • Fall 2009 • Distinctive Features
Distinctive Feature Theory• Roman Jakobson
– Prague School of Linguistics (Pre-WWII)– Massachusetts Institute of Technology (MIT)
and Harvard University
• Gunnar Fant– KTH - Royal Technical Institute, Stockholm,
Sweden
• Morris Halle– Masschusetts Institute of Technology
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7CSD 232 • Fall 2009 • Distinctive Features
Uses for Distinctive Features• To specify a phoneme
• To specify a class of phonemes
• To describe the set of speech sounds used in a particular language or dialect
• To write concise rules of phonetic change
• To characterize a speech disorder – e.g. substitution, often involving a change of
feature)
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8CSD 232 • Fall 2009 • Distinctive Features
Distinctive Features
• Features are binary (+ or - values)• Each speech sound may be described as a
“bundle” of features• Each member of every pair of phones is
distinguished from the other member by at least one feature value
• Features are universal, but a given language may use a subset of features as distinctive
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9CSD 232 • Fall 2009 • Distinctive Features
Features(*=Original Jakobson, Fant & Halle features)
• *Vocalic/Nonvocalic
• *Consonantal/Nonconsonantal
• Sonorant/Obstruent
• Rhotic/Nonrhotic (vowels)
• Advanced/Nonadvanced (vowels and diphthongs)
• Front/Nonfront (vowels)
• Coronal/Noncoronal [=*Acute/Grave]
• Anterior/Nonanterior [=*Compact/Diffuse] (consonants)
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10CSD 232 • Fall 2009 • Distinctive Features
Features, continued (*=Original Jakobson, Fant & Halle features)
• High/Nonhigh
• Low/Nonlow
• Back/Nonback
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11CSD 232 • Fall 2009 • Distinctive Features
Features, continued (*=Original Jakobson, Fant & Halle features)
• Rounded/Nonrounded (*Flat/Plain)
• Distributed/Nondistributed
• *Nasal/nonnasal
• Lateral/Nonlateral
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12CSD 232 • Fall 2009 • Distinctive Features
Features, concluded(*=Original Jakobson, Fant & Halle features)
• *Continuant/Stop
• *Tense/lax (vowels)
• *Voiced/voiceless
• *Strident/Nonstrident (consonants)
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13CSD 232 • Fall 2009 • Distinctive Features
Redundancy Rules
• All vowels in English are [+ Voiced]
• All [-Voiced] sounds are [+Consonantal], [-Nasal], [-Sonorant] and [-Vocalic]
• [+Anterior] sounds are [-Distributed]• Sounds that are both [-Continuant] and
[+Anterior] are [-Strident]
• [-Coronal] sounds are [-Lateral]
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14CSD 232 • Fall 2009 • Distinctive Features
With Redundancy eliminated
/p/= [-Voiced]
[-Continuant]
[+Anterior]
[-Coronal]
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15CSD 232 • Fall 2009 • Distinctive Features
Features Used to Define A Class
• Class of “Stop Consonants”
• /p,b,t,d,k,g/:[+Consonantal][-Vocalic][-Continuant][-Nasal][-Distributed]
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16CSD 232 • Fall 2009 • Distinctive Features
Concept of “Complement”
A B
A is the complement of B
B is the complement of A
A “complements” B.A + B = whole
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17CSD 232 • Fall 2009 • Distinctive Features
Complementary Distribution
• aspirated /p/ in syllable initial position “pot”
[p(et]
• non-aspirated after /s/ “spot”
[sp)et]
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18CSD 232 • Fall 2009 • Distinctive Features
Free Variation
• “cigarette” - stress on first or last syllable
• “economics” - first vowel sound /i/ or /2/
• aspiration of final /p/ in “pop”
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19CSD 232 • Fall 2009 • Distinctive Features
Phonotactic Rules
• Some languages permit only CV syllables
• English has consonant clusters “sixths”
• Some languages permit eng (or engma) [a] as first sound in a word
• If a word starts with three consonants, the first must be /s/
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20CSD 232 • Fall 2009 • Distinctive Features
Levels of Structure
• Phone
• Phoneme
• Morpheme
• Word
• Phrase
• Sentence
• Paragraph
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21CSD 232 • Fall 2009 • Distinctive Features
Phonological Rules
• Sound Changes
• Example:“write” /re]t/
“writing” / re]ú8a //t/ becomes /ú/ when it occurs between a
preceding vowel and a following non-stressed vowel
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22CSD 232 • Fall 2009 • Distinctive Features
Using Distinctive Features To Indicate A Sound Change Rule
[-Voiced] [+Voiced] /+ Vocalic-Consonantal
+Coronal+Anterior----------Continuant-Nasal
+Vocalic-Consonantal-Stress
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23CSD 232 • Fall 2009 • Distinctive Features
Example of a Substitution Rule
/c/ /s/
A common substitution made by children
“shoe” pronounced as “Sue”
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24CSD 232 • Fall 2009 • Distinctive Features
Feature Representation of Rule
-Anterior
+High + Anterior
-High/
+ Consonantal
+ Coronal
- Nasal
- Low
-------------
-------------
+Strident
-Voiced