Sentence examples for phone length from inspiring English sources
Figure 8 A comparison between the individual phone length correlations of Figure 3 (circle marker) and the individual phone length correlations when all samples showing a nonzero Psychomotor Retardation rating are removed from the calculation (cross marker).
Phone length: The duration of consonants and vowels, henceforth referred to as phone length (in contrast to pause length), varied in a non-uniform manner over the observed depression severities.
Different color bars indicate the method of feature selection, "none" being no-feature selection (i.e., all phone length features used).
Figure 12 A comparison between the phone length derivative and base value (see Section 5.1) correlations with depression rating.
In Figure 12, we show a plot comparing the individual phone length correlations of Figure 3 to the corresponding derivatives of the phone lengths.
We have also introduced a preliminary study for classification of depression severity based on our speech-rate features using phone length derived from phone-recognition boundaries.
We observe that our largest correlations thus far are reached by our "optimally" selected composite phone lengths with each sub-topic.
The resulting correlation between the weighted sum of the individual phone lengths and the relevant score is shown in Table 3.
More formally, denote the average length of phone k by L k and suppose that a subset P i is the set of significantly correlated average phone lengths for HAMD sub-topic i.
In contrast, for the HAMD Work and Activities sub-topic, a correlation gain from 0.28 (/ih/) to 0.39 (/sil/, /aa/, /ih/, /ow/, /eh/, /s/) is achieved using only 6 phone lengths in the composite feature.
The largest correlation of the composite phone lengths is again reached by the HAMD Psychomotor Retardation measure with a value of 0.58, although the gain in correlation value from 0.47 (achieved with /t/) to 0.58 is small, considering the large number of phones that contribute to the composite feature (19 phone durations and pause/silence duration).
