Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Britannica Sources used in this answer

How do the tongue, lips, teeth, and palate shape speech sounds?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Diagram of a human head in profile showing the location of vocal organs and possible places of articulation for speech sounds, with labels for lips, teeth, tongue, palate, uvula, pharynx, and vocal cords, and numbered regions corresponding to types of articulation such as bilabial, alveolar, and velar.
phonetics Diagram depicting the location of human vocal organs and possible places of articulation used for speech.

In phonetics, speech sounds are produced by modifying an airstream through the configuration of the vocal tract. This process, known as articulation, involves moving lower articulators—primarily the tongue and lower lip—toward rigid or stationary upper structures.12

  • Tongue: As the most mobile organ, the tongue is essential for shaping speech. Its various parts (tip, blade, front, center, back, and root) move toward specific upper structures to create different sounds. For example, the tongue tip or blade interacts with the teeth for dental sounds or the alveolar ridge for alveolar sounds.23
  • Lips: The lips are involved in bilabial sounds (using both lips) and labialization, where lip-rounding modifies the sound.13
  • Teeth: The upper teeth serve as a passive point of contact for the tongue tip or blade to produce dental consonants.3
  • Palate: The roof of the mouth consists of the hard palate and the flexible soft palate (velum). The tongue approaches the hard palate for palatal sounds, while the soft palate acts as a valve; when raised, it blocks the nasal tract, and when lowered, it allows air to pass through the nose for nasal sounds.23