The Place of Constriction of the air flow through the vocal tract is one distinctive feature for consonants.

• The four Distinctive Features for Consonants, that I have selected to discuss, include the Place of Articulation, the Manner, the inclusion of larynx (plus or minus voicing) and the inclusion of nasal resonance (plus or minus nasality resonance).

  Place of Articulation. The hallmark of a consonant is the constriction of the airflow somewhere on the vocal tract. This constriction creates a noise, as we discussed earlier.

• There are certain locations along the oral tract (phonemic boundaries) where constriction has the potential to create a different phoneme. These locations can be described from front to back. Different languages select some boundaries that are the same and others that are different.
  
  
• In English the most forward constriction boundary is the two lips (e.g., the bilabial "B").

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