connected discourse Flashcards
what does ‘concatenated’ mean?
artificial speech with pure phonemes, not co-articulated. Sounds like robo-voice- in real life phonetic boundaries aren’t fixed and acoustic reliasations are different
What factors affect phonetics in connected discourse
speech rate, speaking style, prosody, characteristics and emotion
what is coarticulation?
gestures for adjacent segments overlap in time– prepare articulation for next phoneme so effects neighbouring sounds- speech is fast; can occur over a number of segments
articulatory, acoustic and perceptual effects
can be modelled by articulation, features are carried through adjacent phonemes, coarticulation is expected so sounds strange without despite being potentially unintelligible.
what is speech rate?
number of output units (eg syllables or phonemes) produced per unit of time (Eg minute)
what is articulation rate?
number of output units (eg syllables or phonemes) produced per unit of time (Eg minute) EXCLUDING PAUSES (possible to train)
how does speech rate affect articulation?
1) reduced duration of phonemes
2) articulators undershoot or overshoot (miss target)
3) effect on pause (frequency and duration)
what is within-speaker plasticity?
ability to adapt speaking style to audience or situation (dependent on this)
Describe Lindblom’s hyper-hyper theory of speech production (1990)
hypO articulation is casual and friendly, hypER articulation is very clear and intonated
Macdonald 13
Production-Distribution-Comprehension (PDC) model– argued that speech is always as simple as possible and independent of needs of audience
Burnham 02; Uther 07; said…
adapt speech for different audiences (FDS, IDS, PDS)
FDS and IDS are characterised by..
lowered speech rate, enhanced segmental constraints: LINGUISTIC DIDACTIC
IDS AND PDS are characterised by…
heightened pitch and wide range of voice qualities: AFFECTIVE-EMOTIONAL
PDS is also characterised by…
pitch intensity/ volume: ATTENTIONAL
What is the Lucid Project?
Hazan and Baker 11: communicative intent to overcome barriers– diapix task; talk over headphones and overcome babble and vocoded speech:
significant change for babble conditions (median pith and range and energy), no change for speech rate and vowel enhancement
Name 3 dysfluencies in speech production
reduction, dysfluencies, pauses
reduction
centralise vowels, reduced vowel space, miss out sounds
dysfluencies
reeats, restarts, fillers, editing expressions
pauses
empty or filled pauses (Bartfield, 01)
how many dysfluencies do speakers average?
Schriberg 2001: 6 per 100 words
what are suprasegmental features in sentence prosody?
differences in acoustics which change perception and meaning (eg pitch, loudness, rhythm)
How can pitch change meaning
rising or falling intonation (Eg to form a question) and signal paralinguistic info such as emotion, health and speaking style ( can see in spectrogram)
what does ‘reduced form’ mean?
when words or phrases are blurred or reduced habitually or from emotion so they are virtually unrecognisable but convention and context allows us to decode
How does reduced form affect content and function words?
Johnson 04: analysed large sample of interviews, found 6% content and 4.5 % content words so make up big proportion of speech
Dalby 86 reduced form-
syllable deletion rates are high proportion, (supported in Dutch- schupper 11)
Amongst friends males had a deletion rate of 19%
Gender/age differences in reduced form?
men more than women, young more than old and areas/accent/dialect affects it
is reduced form categorical or gradient?
gradient so systematic in placing of phoneme in word/phrase not determined by category of phoneme
what are the conditions of understanding reduced form?
NATIVE/SAME DIALECT and CONTEXT = must be BOTH and context must be more than just phonological (ernestus 02)
what are ‘phonetic implementation rules’?
mechanism to implement phoneme reduction rules– convert full representations while listening/speaking
what are ‘pure exemplar’ models? (Goldinger 98)
all exemplars are stored, reduced and full so can access both and could potentially also house info on cntext
what are ‘hybrid models’
full and reduced stored in lexicon but activated by abstract representations and exemplars