Computation of coarticulation, speech sound distortion, searching articulatory behavior, and variability indices.
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Parameter/function | Description | |
CA | Coarticulation index | |
SSD | Speech sound distortion index | |
SAB | Searching articulatory behavior index | |
VAR | Variability index | |
V1j | Vowel 1 | |
j = {/a/,/i/,/u/} | ||
Ck | Consonant | |
k = {/b/,/d/,/g/} | ||
V2l | Vowel 2 | |
l = {/a/,/i/,/u/} | ||
S = {V1j, Ck, V2l} | S = list of all speech sounds | |
Wj,k,l = V1jCkV2l | W = list of all possible words (e.g. W1,1,1 is /aba/; W2,k,l are all words beginning with /i/.) | |
Fi,m(S〈Wj,k,l〉) | Formant i at measurement point m of speech sound S in the context of word W. (Note that the formant values measured in Hz were normalized using a log10(x)-transformation.) | |
i = {F1,F2,F3} | ||
m = {beginning, middle, end} | ||
T = Target(F) | Target value of formant F | |
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Standard deviation of set x with number of elements n |
Calculations | |
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Mean formant frequency | |
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Anticipatory coarticulation | |
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Carry-over coarticulation | |
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Speech sound distortion | |
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Searching articulatory behavior | |
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Variability | |
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