The phrase "vocal tract" refers to the parts in our body that help us produce sound when speaking or singing. It includes our throat, mouth, and nose. Full definition
The results indicate that sensations from the jaw and vocal tract alone can be used for speech learning. (sciencemag.org)
In the current study we used X-ray cinematographic imaging of naturally vocalizing monk parakeets (Myiopsitta monachus) to assess which articulators are possibly involved in vocal tract filtering in this species. (jeb.biologists.org)
Clearly, there is increasing evidence for the importance of vocal tract filtering in the production of avian vocalizations. (jeb.biologists.org)