The phrase "a vocal tract" is correct and usable in written English.
It can be used in discussions related to anatomy, speech production, or phonetics.
Example: "The vocal tract plays a crucial role in the production of speech sounds."
Alternatives: "the speech tract" or "the voice tract".
The sound generation system is based on a parametric synthesizer that features a spectral voice source model, a vocal tract model consisting of parallel filters for vocalic formants and cascaded with anti-resonance for the spectral effect of hypo-pharynx cavities, and rules for parameter settings and source/filter dependencies between fundamental frequency, vocal effort, and formants.
But David Frayer and Chris Nicolay at the University of Kansas have, over the past couple of years, shown that it is at least equally plausible that Neanderthals possessed a vocal tract similar to a modern adult's.
The modeling process therefore needs to learn, for each vowel, a vocal tract shape associated with 18 articulatory parameters, as shown in Table 1, and a strength parameter.
As a practical application of the proposed method, the identification of a vocal tract system is performed from natural speech signals.
Conclusions and suggestions for future work are given in Section 7. A speech production model generally contains three components: an excitation source, a vocal tract model and a radiation model.
The vocal tract size parameter S is mapped to a vocal tract scale factor α S ranging from 0.5 to 2.2 with the linear equation: alpha_{S} = 1.7 S + 0.5 (22).
In fact, the formant spacing of the later inhalation phases of male bellows predicts a vocal-tract length of around 50cm, which is nearly the entire length of an adult male koala's body.
One version simulated a large monkey with a vocal-tract length of 10 cm, and the other simulated a small monkey with a vocal-tract length of 5.5 cm.
Synchronously with the videos, the subjects heard a coo that was from a long vocal tract (10 cm) or a short vocal tract (5.5 cm) and was based on a call from a third individual.
Such context-specific variation has usually been interpreted as providing information on the competitive potential in the framework of a size frequency allometry: only large individuals having a large vocal organ and a large vocal tract may be able to produce low-frequency vocalizations.
In the case of the speech signals in this first experiment, the components of the full-formant stimuli might be integrated because they are all recognized as arising from a common generator, a single vocal tract.
