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47 Cards in this Set

  • Front
  • Back
Glottal wave
like guitar string, vocal cords vibrate, they have a resonance frequency
Filter
As the glottal wave passes through a vocal tract, it forms a resonance chamber and forms resonating frequencies
Perceptual Property
Quality, loudness, pitch
Acoustic Property
Formants, amplitude/intensity, fundamental frequency
How is a vowel created?
Source+filter= vowel
Formants
- Product of resonant frequencies plus filters
-different sets of resonant frequencies
- Some resonant frequencies have higher energy than others
Spectrogram
- Visual Represenation of frequencies over time
Difference btween F1 and F2 in spectrogram
- It indicates backness
- a large gaps means a front vowel
- a small gap means a back vowel
What does F1 tell you
there is an inverse relationship between height of vowel and height of the first formant
How can you tell lip rounding in spectrograms
It lowers the F2, F3, and higher
How can you tell dipthongs
They have a changing formant structure
Fundamental frequency is a formant: true or false?
false
How to tell if there is voicing in a spectrogram
- there is a voice bar
How to tell if there is aspiration in a spectrogram
- there is a period of "noise" after burst
How to tell Alveolars in a spectrogram [t] and [d]
Tail of F2 will point to 1700-1800 hertz
How to tell bilabial [b], [p]
Tails of f1 and F2 go down (they rise before the sound and then fall after the sound)
Accent of Korean or Japanese
[upside down r] and [l] are often confused
Co-articulation
The overlapping of adjacent articulations, usually in the form of the vowel overpowering the articulation of the consonant
- Ohman's discovery- coarticulation of a vowel
The three challenges of speech perception
1. Speaker variability
2. Segment variability
3. Segmenting the speech stream into words
Speaker variability
1. Variability between speakers
- fundamental frequencies vary between speakers
- speaking rate
- accents between speakers
2. Variability within speakers
- Emotional state
- speaking rate
- Possition of word within a sentence
Segment Variability
1. Stress
2. Co-articulation
Non-variation (things that dont change)
Vowels: Relative formant levels
Consonants: importance of formant transitions
Word Segmentation
How we segenment speech streams into words
1. Largely a guessing games
2. Segmentation strategies
Word Segmentation errors
Mondegreens- word segmentation
Segmentaiton strategies
1. Starting at the end of utterances
2. Using words you already know
3. Looking for stressed syllables
4. Use phonotactics
5. Use experience (the last thing)
How we learn segmenation
1. patterns (linkind to the end of utterances)
2. Statical patterns
3. Stress
Preferencial listening experiment (can babies tell words from non-words)
- The baby uses statical patterns to tell if a word a non-sense word or a real word
- Dependent variable- how long the baby look at a light
- "novelity prerence for new words"
Forced Choice identification
we simply ask the participant to distinguish different sounds which are different VOT times, and “what did you hear”… a very simple concept… it doesn’t work on infants obviously
Categorical perception over time
1. As soon as we are 1 month old we are able to detect VOT
Three categorical perception tests in babies
1. High Amplitude sucking (dihabuation of the same sound)
2. Preferencial listening in visual domain (we loose sensitivity to visually recognize different languages after 8 months)
3. Conditioned Head turn (conditioned a kid to turn his head when they turned to Ba, shows that babies can understand categorical perception)
Categorical perception in Animals
- Chinchillas detect +30 boundary
- Crickets use chirp frequencies (high frequencies indicate threat)
Losing Categories
- Infants are able to distinguish nearly every phonemic contrast they have been tested
- They loose this ability after 12 months
Language in British Columbia Thompson Salish (Nthlakampx)
[k'] ‐ air compressed between tongue/velum and glottis, [q'] ‐ air compressed between tongue/uvula and glottis
Position of Vowel phonemes is dictated by
1. Maximize perceptibility
2.. Articulatory dispersion correlates with acoustic dispersion
3. Confounded by ease of articulation
Margi
- Two vowel phomenes
- They are not at the extremes, they central vowels because they are distinguishable but easy to pronounce
Hyper-articulation
In babies led speech we hyper-articulate speech /i/, /a/, /u/, in order to assist in the aquision of vowel phonemes
Great Vowel shift
A shifted first, then all vowels seemed to move upward
Middle english
1100-1500
Modern English
1500 on
Broca's area
Frontal lobe
- controls the movement of the mouth
- fragmented speech
- Aware of deficit
Wernickies area
temporal lobe
- controls language comprehension
- fluent but empty speech, poor comprehension
Phonetics focuses on
spelling to phonology to meaning
Whole word/whole language
(skips phonology)
- goes from spelling to meaning
Evidence in phonology in reading
Asked if it is a flower (rose vs rows) sometimes people said rows meant flowers… based on how the word sounds
Common mistakes by spanish influenced English
- Pronouncing vowel phonemes as if in spanosh
- Dipthongs to mono-thongs
- No TH sounds, no v sound, no /v/ sound
- Voiced fricative to stop shift
- Fricatives to stops
- Palatal consonant shift
English Influenced Spanish
- aspiration of voiceless stops
- vowel reduction in unstressed syllables
- diphthongization of mid vowel
How to tell consonant stops in a spectrogram
- Constriction: look at formant transitions for F1 – it rises out of a constriction and falls into one
- Alveolars- [t],[d] – tail of f2 will point to 1700-1800 hertz
- bilabial- [b],[p] – the tails of f1 and f2 go down (rise before the sound, go down after)
- Velar stop consonant (the velar pinch) [k]