1. The lips are brought together to obstruct the oral cavity.
2. Tongue position may vary depending on phonetic context.
3. The vocal folds are adducted and vibrating.
4. The velopharyngeal port is closed.
5. Air pressure built up behind obstructions released by parting lips, producing noise burst.
How to pronounce the b sound
The b sound is voiced, and is the counterpart to the unvoiced p sound.
To create the b sound, air is briefly prevented from leaving the vocal tract by closing the lips. The sound is aspirated when the air is released. The aspiration for a b sound is less than the aspiration for a p sound. The sound is voiced, so the vocal cords vibrate while producing it.
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